message: Pass shared pointer (for sync user in log_in) by value
diff: @@ -524,7 +524,7 @@ void App::log_in_with_credentials(const AppCredentials& credentials,
  { "Authorization", bearer }
  },
  std::string()
  - }, [completion_block, &sync_user](const Response& profile_response) {
  + }, [completion_block, sync_user](const Response& profile_response) {
  if (auto error = check_for_errors(profile_response)) {
  return completion_block(nullptr, error);
  }
  