Fix/replace datetime patterns with naive utc now (#22654)

api/controllers/console/auth/activate.py

@@ -1,5 +1,3 @@
-import datetime
-
 from flask import request
 from flask_restful import Resource, reqparse
 
@@ -7,6 +5,7 @@ from constants.languages import supported_language
 from controllers.console import api
 from controllers.console.error import AlreadyActivateError
 from extensions.ext_database import db
+from libs.datetime_utils import naive_utc_now
 from libs.helper import StrLen, email, extract_remote_ip, timezone
 from models.account import AccountStatus
 from services.account_service import AccountService, RegisterService
@@ -65,7 +64,7 @@ class ActivateApi(Resource):
         account.timezone = args["timezone"]
         account.interface_theme = "light"
         account.status = AccountStatus.ACTIVE.value
-        account.initialized_at = datetime.datetime.now(datetime.UTC).replace(tzinfo=None)
+        account.initialized_at = naive_utc_now()
         db.session.commit()
 
         token_pair = AccountService.login(account, ip_address=extract_remote_ip(request))