add notification logic for backend

api/controllers/console/notification.py

@@ -0,0 +1,26 @@
+from flask_restx import Resource
+
+from controllers.console import console_ns
+from controllers.console.wraps import account_initialization_required, only_edition_cloud, setup_required
+from libs.login import current_account_with_tenant, login_required
+from services.billing_service import BillingService
+
+
+@console_ns.route("/notification")
+class NotificationApi(Resource):
+    @console_ns.doc("get_notification")
+    @console_ns.doc(description="Get notification for the current user")
+    @console_ns.doc(
+        responses={
+            200: "Success",
+            401: "Unauthorized",
+        }
+    )
+    @setup_required
+    @login_required
+    @account_initialization_required
+    @only_edition_cloud
+    def get(self):
+        current_user, _ = current_account_with_tenant()
+        notification = BillingService.read_notification(current_user.email)
+        return notification