class Google::Cloud::Storage::Service

def list_hmac_keys max: nil, token: nil, service_account_email: nil,
                   project_id: nil, show_deleted_keys: nil,
                   user_project: nil, options: {}
  execute do
    service.list_project_hmac_keys \
      (project_id || @project),
      max_results: max, page_token: token,
      service_account_email: service_account_email,
      show_deleted_keys: show_deleted_keys,
      user_project: user_project(user_project),
      options: options
  end
end