Fix a typo that broke oidc token verification

hiboo/sso/oidc.py

@@ -86,7 +86,7 @@ class AuthorizationCodeMixin(object):
         obj = AuthorizationCodeMixin.AuthorizationCode.unserialize(
             utils.redis.hgetall("code:{}".format(code))
         )
-        return self if obj and obj.client_id == client.client_id else None
+        return obj if obj and obj.client_id == client.client_id else None
 
     def delete_authorization_code(self, authorization_code):
         utils.redis.delete("code:{}".format(authorization_code))