Ruby on rails devise_token_auth gem无法找到路由

Question

我执行以下步骤：

1。创建Rails应用程序

rails new my_api_app --api

2。添加devise_token_auth gem

gem 'devise_token_auth'
gem 'omniauth'

3。安装捆绑包

bundle install

4。安装Gem

rails g devise_token_auth:install User auth
rails db:migrate

5。设置路线

  namespace :api do
    scope :v1 do
      mount_devise_token_auth_for "User", at: 'auth', skip: [:omniauth_callbacks]
    end
  end

6。这是铁路路线结果

7。通过浏览器在Rest Client上测试应用程序：

8。这是日志：

AbstractController::ActionNotFound (The action 'new' could not be found for DeviseTokenAuth::RegistrationsController):

actionpack (5.0.0) lib/abstract_controller/base.rb:121:in `process'
actionpack (5.0.0) lib/action_controller/metal.rb:190:in `dispatch'
actionpack (5.0.0) lib/action_controller/metal.rb:262:in `dispatch'
actionpack (5.0.0) lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack (5.0.0) lib/action_dispatch/routing/route_set.rb:32:in `serve'
actionpack (5.0.0) lib/action_dispatch/routing/mapper.rb:16:in `block in <class:Constraints>'
actionpack (5.0.0) lib/action_dispatch/routing/mapper.rb:46:in `serve'
actionpack (5.0.0) lib/action_dispatch/journey/router.rb:39:in `block in serve'
actionpack (5.0.0) lib/action_dispatch/journey/router.rb:26:in `each'
actionpack (5.0.0) lib/action_dispatch/journey/router.rb:26:in `serve'
actionpack (5.0.0) lib/action_dispatch/routing/route_set.rb:725:in `call'
warden (1.2.6) lib/warden/manager.rb:35:in `block in call'
warden (1.2.6) lib/warden/manager.rb:34:in `catch'
warden (1.2.6) lib/warden/manager.rb:34:in `call'
rack (2.0.1) lib/rack/etag.rb:25:in `call'
rack (2.0.1) lib/rack/conditional_get.rb:25:in `call'
rack (2.0.1) lib/rack/head.rb:12:in `call'
activerecord (5.0.0) lib/active_record/migration.rb:552:in `call'
actionpack (5.0.0) lib/action_dispatch/middleware/callbacks.rb:38:in `block in call'
activesupport (5.0.0) lib/active_support/callbacks.rb:97:in `__run_callbacks__'
activesupport (5.0.0) lib/active_support/callbacks.rb:750:in `_run_call_callbacks'
activesupport (5.0.0) lib/active_support/callbacks.rb:90:in `run_callbacks'
actionpack (5.0.0) lib/action_dispatch/middleware/callbacks.rb:36:in `call'
actionpack (5.0.0) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.0.0) lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
actionpack (5.0.0) lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
actionpack (5.0.0) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
railties (5.0.0) lib/rails/rack/logger.rb:36:in `call_app'
railties (5.0.0) lib/rails/rack/logger.rb:24:in `block in call'
activesupport (5.0.0) lib/active_support/tagged_logging.rb:70:in `block in tagged'
activesupport (5.0.0) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (5.0.0) lib/active_support/tagged_logging.rb:70:in `tagged'
railties (5.0.0) lib/rails/rack/logger.rb:24:in `call'
actionpack (5.0.0) lib/action_dispatch/middleware/request_id.rb:24:in `call'
rack (2.0.1) lib/rack/runtime.rb:22:in `call'
activesupport (5.0.0) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
actionpack (5.0.0) lib/action_dispatch/middleware/executor.rb:12:in `call'
actionpack (5.0.0) lib/action_dispatch/middleware/static.rb:136:in `call'
rack (2.0.1) lib/rack/sendfile.rb:111:in `call'
railties (5.0.0) lib/rails/engine.rb:522:in `call'
puma (3.6.0) lib/puma/configuration.rb:225:in `call'
puma (3.6.0) lib/puma/server.rb:578:in `handle_request'
puma (3.6.0) lib/puma/server.rb:415:in `process_client'
puma (3.6.0) lib/puma/server.rb:275:in `block in run'
puma (3.6.0) lib/puma/thread_pool.rb:116:in `block in spawn_thread'

请帮助检测错误的代码，任何建议或帮助都会得到满足。