diff --git a/rplugin/python3/CopilotChat/copilot.py b/rplugin/python3/CopilotChat/copilot.py
index eb79e135..2723c5dd 100644
--- a/rplugin/python3/CopilotChat/copilot.py
+++ b/rplugin/python3/CopilotChat/copilot.py
@@ -89,6 +89,8 @@ def authenticate(self):
         }
 
         self.token = self.session.get(url, headers=headers).json()
+        if not self.token.get("token"):
+            raise Exception(f"Failed to authenticate: {self.token}")
 
     def reset(self):
         self.chat_history = []