diff --git a/users/services.py b/users/services.py
index e80e654..d81e6e6 100644
--- a/users/services.py
+++ b/users/services.py
@@ -115,8 +115,11 @@ class GithubTokenService:
                 timeout=10,
                 )
             resp.raise_for_status()
-            print(resp.json())
-            return resp.json()
+            data = resp.json()
+            if "error" in data:
+                msg = data.get("error_description", data["error"])
+                raise Exception(f"GitHub token exchange failed: {msg}")
+            return data
         except requests.HTTPError as e:
             raise Exception(
                 f"Github token exchange failed: {e.response.status_code} - {e.response.text}"