{dev bugfix} replace prompt message on username issue

app/helper/decorators.py

@@ -92,7 +92,7 @@ class rms:
             if username.count() >= 1:
                 return Response(
                     {
-                        "message": f"{username.first().username} is already taken",
+                        "message": f"username {username.first().username} is already taken",
                     },status=status.HTTP_400_BAD_REQUEST
                 )
             return function(self, request, *args, **kwargs)