Fix authentication header handling - omit x-forwarded-email when missing instead of empty string

Author: lokeshrangineni

backend/app/api/v1/validate.py

@@ -120,7 +120,11 @@ async def validate_with_headers(request: Request) -> User:
             path="/",
             headers={
                 "x-forwarded-user": request.headers.get("X-Forwarded-User"),
-                "x-forwarded-email": request.headers.get("X-Forwarded-Email") or "",
+                **(
+                    {"x-forwarded-email": request.headers.get("X-Forwarded-Email")}
+                    if request.headers.get("X-Forwarded-Email")
+                    else {}
+                ),
             },
             params={},
         ),