fix bug around fetching user from token

Author: Zsailer

jupyter_server/auth/identity.py

@@ -540,8 +540,7 @@ def process_login_form(self, handler: JupyterHandler) -> User | None:
             return self.generate_anonymous_user(handler)
 
         if self.token and self.token == typed_password:
-            # type:ignore[attr-defined]
-            return self.user_for_token(typed_password)
+            return self.get_user_token(typed_password)  # type:ignore[attr-defined]
 
         return user