feat: account delete (#11829)

Co-authored-by: NFish <douxc512@gmail.com>

api/configs/feature/__init__.py

@@ -765,6 +765,13 @@ class LoginConfig(BaseSettings):
     )
 
 
+class AccountConfig(BaseSettings):
+    ACCOUNT_DELETION_TOKEN_EXPIRY_MINUTES: PositiveInt = Field(
+        description="Duration in minutes for which a account deletion token remains valid",
+        default=5,
+    )
+
+
 class FeatureConfig(
     # place the configs in alphabet order
     AppExecutionConfig,
@@ -792,6 +799,7 @@ class FeatureConfig(
     WorkflowNodeExecutionConfig,
     WorkspaceConfig,
     LoginConfig,
+    AccountConfig,
     # hosted services config
     HostedServiceConfig,
     CeleryBeatConfig,

api/controllers/console/auth/error.py

@@ -53,3 +53,9 @@ class EmailCodeLoginRateLimitExceededError(BaseHTTPException):
     error_code = "email_code_login_rate_limit_exceeded"
     description = "Too many login emails have been sent. Please try again in 5 minutes."
     code = 429
+
+
+class EmailCodeAccountDeletionRateLimitExceededError(BaseHTTPException):
+    error_code = "email_code_account_deletion_rate_limit_exceeded"
+    description = "Too many account deletion emails have been sent. Please try again in 5 minutes."
+    code = 429

api/controllers/console/auth/forgot_password.py

@@ -6,13 +6,8 @@ from flask_restful import Resource, reqparse  # type: ignore
 
 from constants.languages import languages
 from controllers.console import api
-from controllers.console.auth.error import (
+from controllers.console.auth.error import EmailCodeError, InvalidEmailError, InvalidTokenError, PasswordMismatchError
-    EmailCodeError,
+from controllers.console.error import AccountInFreezeError, AccountNotFound, EmailSendIpLimitError
-    InvalidEmailError,
-    InvalidTokenError,
-    PasswordMismatchError,
-)
-from controllers.console.error import AccountNotFound, EmailSendIpLimitError
 from controllers.console.wraps import setup_required
 from events.tenant_event import tenant_was_created
 from extensions.ext_database import db
@@ -20,6 +15,7 @@ from libs.helper import email, extract_remote_ip
 from libs.password import hash_password, valid_password
 from models.account import Account
 from services.account_service import AccountService, TenantService
+from services.errors.account import AccountRegisterError
 from services.errors.workspace import WorkSpaceNotAllowedCreateError
 from services.feature_service import FeatureService
 
@@ -129,6 +125,8 @@ class ForgotPasswordResetApi(Resource):
                 )
             except WorkSpaceNotAllowedCreateError:
                 pass
+            except AccountRegisterError as are:
+                raise AccountInFreezeError()
 
         return {"result": "success"}
 

api/controllers/console/auth/login.py

@@ -5,6 +5,7 @@ from flask import request
 from flask_restful import Resource, reqparse  # type: ignore
 
 import services
+from configs import dify_config
 from constants.languages import languages
 from controllers.console import api
 from controllers.console.auth.error import (
@@ -16,6 +17,7 @@ from controllers.console.auth.error import (
 )
 from controllers.console.error import (
     AccountBannedError,
+    AccountInFreezeError,
     AccountNotFound,
     EmailSendIpLimitError,
     NotAllowedCreateWorkspace,
@@ -26,6 +28,8 @@ from libs.helper import email, extract_remote_ip
 from libs.password import valid_password
 from models.account import Account
 from services.account_service import AccountService, RegisterService, TenantService
+from services.billing_service import BillingService
+from services.errors.account import AccountRegisterError
 from services.errors.workspace import WorkSpaceNotAllowedCreateError
 from services.feature_service import FeatureService
 
@@ -44,6 +48,9 @@ class LoginApi(Resource):
         parser.add_argument("language", type=str, required=False, default="en-US", location="json")
         args = parser.parse_args()
 
+        if dify_config.BILLING_ENABLED and BillingService.is_email_in_freeze(args["email"]):
+            raise AccountInFreezeError()
+
         is_login_error_rate_limit = AccountService.is_login_error_rate_limit(args["email"])
         if is_login_error_rate_limit:
             raise EmailPasswordLoginLimitError()
@@ -113,8 +120,10 @@ class ResetPasswordSendEmailApi(Resource):
             language = "zh-Hans"
         else:
             language = "en-US"
-
+        try:
-        account = AccountService.get_user_through_email(args["email"])
+            account = AccountService.get_user_through_email(args["email"])
+        except AccountRegisterError as are:
+            raise AccountInFreezeError()
         if account is None:
             if FeatureService.get_system_features().is_allow_register:
                 token = AccountService.send_reset_password_email(email=args["email"], language=language)
@@ -142,8 +151,11 @@ class EmailCodeLoginSendEmailApi(Resource):
             language = "zh-Hans"
         else:
             language = "en-US"
+        try:
+            account = AccountService.get_user_through_email(args["email"])
+        except AccountRegisterError as are:
+            raise AccountInFreezeError()
 
-        account = AccountService.get_user_through_email(args["email"])
         if account is None:
             if FeatureService.get_system_features().is_allow_register:
                 token = AccountService.send_email_code_login_email(email=args["email"], language=language)
@@ -177,7 +189,10 @@ class EmailCodeLoginApi(Resource):
             raise EmailCodeError()
 
         AccountService.revoke_email_code_login_token(args["token"])
-        account = AccountService.get_user_through_email(user_email)
+        try:
+            account = AccountService.get_user_through_email(user_email)
+        except AccountRegisterError as are:
+            raise AccountInFreezeError()
         if account:
             tenant = TenantService.get_join_tenants(account)
             if not tenant:
@@ -196,6 +211,8 @@ class EmailCodeLoginApi(Resource):
                 )
             except WorkSpaceNotAllowedCreateError:
                 return NotAllowedCreateWorkspace()
+            except AccountRegisterError as are:
+                raise AccountInFreezeError()
         token_pair = AccountService.login(account, ip_address=extract_remote_ip(request))
         AccountService.reset_login_error_rate_limit(args["email"])
         return {"result": "success", "data": token_pair.model_dump()}

api/controllers/console/auth/oauth.py

@@ -16,7 +16,7 @@ from libs.oauth import GitHubOAuth, GoogleOAuth, OAuthUserInfo
 from models import Account
 from models.account import AccountStatus
 from services.account_service import AccountService, RegisterService, TenantService
-from services.errors.account import AccountNotFoundError
+from services.errors.account import AccountNotFoundError, AccountRegisterError
 from services.errors.workspace import WorkSpaceNotAllowedCreateError, WorkSpaceNotFoundError
 from services.feature_service import FeatureService
 
@@ -99,6 +99,8 @@ class OAuthCallback(Resource):
                 f"{dify_config.CONSOLE_WEB_URL}/signin"
                 "?message=Workspace not found, please contact system admin to invite you to join in a workspace."
             )
+        except AccountRegisterError as e:
+            return redirect(f"{dify_config.CONSOLE_WEB_URL}/signin?message={e.description}")
 
         # Check account status
         if account.status == AccountStatus.BANNED.value:

api/controllers/console/error.py

@@ -92,3 +92,12 @@ class UnauthorizedAndForceLogout(BaseHTTPException):
     error_code = "unauthorized_and_force_logout"
     description = "Unauthorized and force logout."
     code = 401
+
+
+class AccountInFreezeError(BaseHTTPException):
+    error_code = "account_in_freeze"
+    code = 400
+    description = (
+        "This email account has been deleted within the past 30 days"
+        "and is temporarily unavailable for new account registration."
+    )

api/controllers/console/workspace/account.py

@@ -11,6 +11,7 @@ from controllers.console import api
 from controllers.console.workspace.error import (
     AccountAlreadyInitedError,
     CurrentPasswordIncorrectError,
+    InvalidAccountDeletionCodeError,
     InvalidInvitationCodeError,
     RepeatPasswordNotMatchError,
 )
@@ -21,6 +22,7 @@ from libs.helper import TimestampField, timezone
 from libs.login import login_required
 from models import AccountIntegrate, InvitationCode
 from services.account_service import AccountService
+from services.billing_service import BillingService
 from services.errors.account import CurrentPasswordIncorrectError as ServiceCurrentPasswordIncorrectError
 
 
@@ -242,6 +244,54 @@ class AccountIntegrateApi(Resource):
         return {"data": integrate_data}
 
 
+class AccountDeleteVerifyApi(Resource):
+    @setup_required
+    @login_required
+    @account_initialization_required
+    def get(self):
+        account = current_user
+
+        token, code = AccountService.generate_account_deletion_verification_code(account)
+        AccountService.send_account_deletion_verification_email(account, code)
+
+        return {"result": "success", "data": token}
+
+
+class AccountDeleteApi(Resource):
+    @setup_required
+    @login_required
+    @account_initialization_required
+    def post(self):
+        account = current_user
+
+        parser = reqparse.RequestParser()
+        parser.add_argument("token", type=str, required=True, location="json")
+        parser.add_argument("code", type=str, required=True, location="json")
+        args = parser.parse_args()
+
+        if not AccountService.verify_account_deletion_code(args["token"], args["code"]):
+            raise InvalidAccountDeletionCodeError()
+
+        AccountService.delete_account(account)
+
+        return {"result": "success"}
+
+
+class AccountDeleteUpdateFeedbackApi(Resource):
+    @setup_required
+    def post(self):
+        account = current_user
+
+        parser = reqparse.RequestParser()
+        parser.add_argument("email", type=str, required=True, location="json")
+        parser.add_argument("feedback", type=str, required=True, location="json")
+        args = parser.parse_args()
+
+        BillingService.update_account_deletion_feedback(args["email"], args["feedback"])
+
+        return {"result": "success"}
+
+
 # Register API resources
 api.add_resource(AccountInitApi, "/account/init")
 api.add_resource(AccountProfileApi, "/account/profile")
@@ -252,5 +302,8 @@ api.add_resource(AccountInterfaceThemeApi, "/account/interface-theme")
 api.add_resource(AccountTimezoneApi, "/account/timezone")
 api.add_resource(AccountPasswordApi, "/account/password")
 api.add_resource(AccountIntegrateApi, "/account/integrates")
+api.add_resource(AccountDeleteVerifyApi, "/account/delete/verify")
+api.add_resource(AccountDeleteApi, "/account/delete")
+api.add_resource(AccountDeleteUpdateFeedbackApi, "/account/delete/feedback")
 # api.add_resource(AccountEmailApi, '/account/email')
 # api.add_resource(AccountEmailVerifyApi, '/account/email-verify')

api/controllers/console/workspace/error.py

@@ -35,3 +35,9 @@ class AccountNotInitializedError(BaseHTTPException):
     error_code = "account_not_initialized"
     description = "The account has not been initialized yet. Please proceed with the initialization process first."
     code = 400
+
+
+class InvalidAccountDeletionCodeError(BaseHTTPException):
+    error_code = "invalid_account_deletion_code"
+    description = "Invalid account deletion code."
+    code = 400

api/services/account_service.py

@@ -32,6 +32,7 @@ from models.account import (
     TenantStatus,
 )
 from models.model import DifySetup
+from services.billing_service import BillingService
 from services.errors.account import (
     AccountAlreadyInTenantError,
     AccountLoginError,
@@ -50,6 +51,8 @@ from services.errors.account import (
 )
 from services.errors.workspace import WorkSpaceNotAllowedCreateError
 from services.feature_service import FeatureService
+from tasks.delete_account_task import delete_account_task
+from tasks.mail_account_deletion_task import send_account_deletion_verification_code
 from tasks.mail_email_code_login import send_email_code_login_mail_task
 from tasks.mail_invite_member_task import send_invite_member_mail_task
 from tasks.mail_reset_password_task import send_reset_password_mail_task
@@ -70,6 +73,9 @@ class AccountService:
     email_code_login_rate_limiter = RateLimiter(
         prefix="email_code_login_rate_limit", max_attempts=1, time_window=60 * 1
     )
+    email_code_account_deletion_rate_limiter = RateLimiter(
+        prefix="email_code_account_deletion_rate_limit", max_attempts=1, time_window=60 * 1
+    )
     LOGIN_MAX_ERROR_LIMITS = 5
 
     @staticmethod
@@ -201,6 +207,15 @@ class AccountService:
             from controllers.console.error import AccountNotFound
 
             raise AccountNotFound()
+
+        if dify_config.BILLING_ENABLED and BillingService.is_email_in_freeze(email):
+            raise AccountRegisterError(
+                description=(
+                    "This email account has been deleted within the past "
+                    "30 days and is temporarily unavailable for new account registration"
+                )
+            )
+
         account = Account()
         account.email = email
         account.name = name
@@ -240,6 +255,42 @@ class AccountService:
 
         return account
 
+    @staticmethod
+    def generate_account_deletion_verification_code(account: Account) -> tuple[str, str]:
+        code = "".join([str(random.randint(0, 9)) for _ in range(6)])
+        token = TokenManager.generate_token(
+            account=account, token_type="account_deletion", additional_data={"code": code}
+        )
+        return token, code
+
+    @classmethod
+    def send_account_deletion_verification_email(cls, account: Account, code: str):
+        email = account.email
+        if cls.email_code_account_deletion_rate_limiter.is_rate_limited(email):
+            from controllers.console.auth.error import EmailCodeAccountDeletionRateLimitExceededError
+
+            raise EmailCodeAccountDeletionRateLimitExceededError()
+
+        send_account_deletion_verification_code.delay(to=email, code=code)
+
+        cls.email_code_account_deletion_rate_limiter.increment_rate_limit(email)
+
+    @staticmethod
+    def verify_account_deletion_code(token: str, code: str) -> bool:
+        token_data = TokenManager.get_token_data(token, "account_deletion")
+        if token_data is None:
+            return False
+
+        if token_data["code"] != code:
+            return False
+
+        return True
+
+    @staticmethod
+    def delete_account(account: Account) -> None:
+        """Delete account. This method only adds a task to the queue for deletion."""
+        delete_account_task.delay(account.id)
+
     @staticmethod
     def link_account_integrate(provider: str, open_id: str, account: Account) -> None:
         """Link account integrate"""
@@ -379,6 +430,7 @@ class AccountService:
     def send_email_code_login_email(
         cls, account: Optional[Account] = None, email: Optional[str] = None, language: Optional[str] = "en-US"
     ):
+        email = account.email if account else email
         if email is None:
             raise ValueError("Email must be provided.")
         if cls.email_code_login_rate_limiter.is_rate_limited(email):
@@ -408,6 +460,14 @@ class AccountService:
 
     @classmethod
     def get_user_through_email(cls, email: str):
+        if dify_config.BILLING_ENABLED and BillingService.is_email_in_freeze(email):
+            raise AccountRegisterError(
+                description=(
+                    "This email account has been deleted within the past "
+                    "30 days and is temporarily unavailable for new account registration"
+                )
+            )
+
         account = db.session.query(Account).filter(Account.email == email).first()
         if not account:
             return None
@@ -824,6 +884,10 @@ class RegisterService:
             db.session.commit()
         except WorkSpaceNotAllowedCreateError:
             db.session.rollback()
+        except AccountRegisterError as are:
+            db.session.rollback()
+            logging.exception("Register failed")
+            raise are
         except Exception as e:
             db.session.rollback()
             logging.exception("Register failed")

api/services/billing_service.py

@@ -70,3 +70,24 @@ class BillingService:
 
         if not TenantAccountRole.is_privileged_role(join.role):
             raise ValueError("Only team owner or team admin can perform this action")
+
+    @classmethod
+    def delete_account(cls, account_id: str):
+        """Delete account."""
+        params = {"account_id": account_id}
+        return cls._send_request("DELETE", "/account/", params=params)
+
+    @classmethod
+    def is_email_in_freeze(cls, email: str) -> bool:
+        params = {"email": email}
+        try:
+            response = cls._send_request("GET", "/account/in-freeze", params=params)
+            return bool(response.get("data", False))
+        except Exception:
+            return False
+
+    @classmethod
+    def update_account_deletion_feedback(cls, email: str, feedback: str):
+        """Update account deletion feedback."""
+        json = {"email": email, "feedback": feedback}
+        return cls._send_request("POST", "/account/delete-feedback", json=json)

api/tasks/delete_account_task.py

@@ -0,0 +1,26 @@
+import logging
+
+from celery import shared_task  # type: ignore
+
+from extensions.ext_database import db
+from models.account import Account
+from services.billing_service import BillingService
+from tasks.mail_account_deletion_task import send_deletion_success_task
+
+logger = logging.getLogger(__name__)
+
+
+@shared_task(queue="dataset")
+def delete_account_task(account_id):
+    account = db.session.query(Account).filter(Account.id == account_id).first()
+    try:
+        BillingService.delete_account(account_id)
+    except Exception as e:
+        logger.exception(f"Failed to delete account {account_id} from billing service.")
+        raise
+
+    if not account:
+        logger.error(f"Account {account_id} not found.")
+        return
+    # send success email
+    send_deletion_success_task.delay(account.email)

api/tasks/mail_account_deletion_task.py

@@ -0,0 +1,70 @@
+import logging
+import time
+
+import click
+from celery import shared_task  # type: ignore
+from flask import render_template
+
+from extensions.ext_mail import mail
+
+
+@shared_task(queue="mail")
+def send_deletion_success_task(to):
+    """Send email to user regarding account deletion.
+
+    Args:
+        log (AccountDeletionLog): Account deletion log object
+    """
+    if not mail.is_inited():
+        return
+
+    logging.info(click.style(f"Start send account deletion success email to {to}", fg="green"))
+    start_at = time.perf_counter()
+
+    try:
+        html_content = render_template(
+            "delete_account_success_template_en-US.html",
+            to=to,
+            email=to,
+        )
+        mail.send(to=to, subject="Your Dify.AI Account Has Been Successfully Deleted", html=html_content)
+
+        end_at = time.perf_counter()
+        logging.info(
+            click.style(
+                "Send account deletion success email to {}: latency: {}".format(to, end_at - start_at), fg="green"
+            )
+        )
+    except Exception:
+        logging.exception("Send account deletion success email to {} failed".format(to))
+
+
+@shared_task(queue="mail")
+def send_account_deletion_verification_code(to, code):
+    """Send email to user regarding account deletion verification code.
+
+    Args:
+        to (str): Recipient email address
+        code (str): Verification code
+    """
+    if not mail.is_inited():
+        return
+
+    logging.info(click.style(f"Start send account deletion verification code email to {to}", fg="green"))
+    start_at = time.perf_counter()
+
+    try:
+        html_content = render_template("delete_account_code_email_template_en-US.html", to=to, code=code)
+        mail.send(to=to, subject="Dify.AI Account Deletion and Verification", html=html_content)
+
+        end_at = time.perf_counter()
+        logging.info(
+            click.style(
+                "Send account deletion verification code email to {} succeeded: latency: {}".format(
+                    to, end_at - start_at
+                ),
+                fg="green",
+            )
+        )
+    except Exception:
+        logging.exception("Send account deletion verification code email to {} failed".format(to))

api/templates/delete_account_code_email_template_en-US.html

@@ -0,0 +1,125 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      line-height: 16pt;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      min-height: 605px;
+      margin: 40px auto;
+      padding: 36px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 2px 4px -2px rgba(9, 9, 11, 0.08);
+    }
+
+    .header {
+      margin-bottom: 24px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 28.8px;
+    }
+
+    .description {
+      font-size: 13px;
+      line-height: 16px;
+      color: #676f83;
+      margin-top: 12px;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .tips {
+      line-height: 16px;
+      color: #676f83;
+      font-size: 13px;
+    }
+
+    .typography {
+      letter-spacing: -0.07px;
+      font-weight: 400;
+      font-style: normal;
+      font-size: 14px;
+      line-height: 20px;
+      color: #354052;
+      margin-top: 12px;
+      margin-bottom: 12px;
+    }
+    .typography p{
+      margin: 0 auto;
+    }
+
+    .typography-title {
+      color: #101828;
+      font-size: 14px;
+      font-style: normal;
+      font-weight: 600;
+      line-height: 20px;
+      margin-top: 12px;
+      margin-bottom: 4px;
+    }
+    .tip-list{
+      margin: 0;
+      padding-left: 10px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <div class="header">
+      <!-- Optional: Add a logo or a header image here -->
+      <img src="https://cloud.dify.ai/logo/logo-site.png" alt="Dify Logo" />
+    </div>
+    <p class="title">Dify.AI Account Deletion and Verification</p>
+    <p class="typography">We received a request to delete your Dify account. To ensure the security of your account and
+      confirm this action, please use the verification code below:</p>
+    <div class="code-content">
+      <span class="code">{{code}}</span>
+    </div>
+    <div class="typography">
+      <p style="margin-bottom:4px">To complete the account deletion process:</p>
+      <p>1. Return to the account deletion page on our website</p>
+      <p>2. Enter the verification code above</p>
+      <p>3. Click "Confirm Deletion"</p>
+    </div>
+    <p class="typography-title">Please note:</p>
+    <ul class="typography tip-list">
+      <li>This code is valid for 5 minutes</li>
+      <li>As the Owner of any Workspaces, your workspaces will be scheduled in a queue for permanent deletion.</li>
+      <li>All your user data will be queued for permanent deletion.</li>
+    </ul>
+  </div>
+</body>
+
+</html>

api/templates/delete_account_success_template_en-US.html

@@ -0,0 +1,105 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      line-height: 16pt;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      min-height: 380px;
+      margin: 40px auto;
+      padding: 36px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 2px 4px -2px rgba(9, 9, 11, 0.08);
+    }
+
+    .header {
+      margin-bottom: 24px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 28.8px;
+      margin-bottom: 12px;
+    }
+
+    .description {
+      color: #354052;
+      font-weight: 400;
+      line-height: 20px;
+      font-size: 14px;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .tips {
+      line-height: 16px;
+      color: #676f83;
+      font-size: 13px;
+    }
+
+    .email {
+      color: #354052;
+      font-weight: 600;
+      line-height: 20px;
+      font-size: 14px;
+    }
+    .typography{
+      font-weight: 400;
+      font-style: normal;
+      font-size: 14px;
+      line-height: 20px;
+      color: #354052;
+      margin-top: 4px;
+      margin-bottom: 0;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <div class="header">
+      <!-- Optional: Add a logo or a header image here -->
+      <img src="https://cloud.dify.ai/logo/logo-site.png" alt="Dify Logo" />
+    </div>
+    <p class="title">Your Dify.AI Account Has Been Successfully Deleted</p>
+    <p class="typography">We're writing to confirm that your Dify.AI account has been successfully deleted as per your request. Your
+      account is no longer accessible, and you can't log in using your previous credentials. If you decide to use
+      Dify.AI services in the future, you'll need to create a new account after 30 days. We appreciate the time you
+      spent with Dify.AI and are sorry to see you go. If you have any questions or concerns about the deletion process,
+      please don't hesitate to reach out to our support team.</p>
+    <p class="typography">Thank you for being a part of the Dify.AI community.</p>
+    <p class="typography">Best regards,</p>
+    <p class="typography">Dify.AI Team</p>
+  </div>
+</body>
+
+</html>