diff --git a/api/blueprints/finstitutions/trading/oauth/callback.py b/api/blueprints/finstitutions/trading/oauth/callback.py
index c57c92e..3d1d14c 100644
--- a/api/blueprints/finstitutions/trading/oauth/callback.py
+++ b/api/blueprints/finstitutions/trading/oauth/callback.py
@@ -63,6 +63,7 @@ from utils_v2.api.async_quart import (
 
 # Data Models:
 from models.core.auth_token import CoreAuthTokenModel
+from models.finstitutions.trading.oauth import TradingOAuthCallbackResponse
 
 # Common:
 from shared import constants
@@ -181,7 +182,7 @@ async def trading_oauth_callback(
     }
 
     # Start by assuming failure:
-    g.client_response = None
+    g.client_response = TradingOAuthCallbackResponse(message = "")
 
     # ┳┓    ┓       ┏┓  ┓    •
     # ┣┫┏┓┏┓┃┏┏┓┏┓  ┗┓┏┓┃┏┓┏╋┓┏┓┏┓