request.env ['omniauth.oauth']返回nil

如何解决request.env ['omniauth.oauth']返回nil

我正在使用 omniauth-google-oauth2 宝石对Google帐户进行授权，并获得授权代码，但获得了 request.env ['omniauth.auth'] 即使将gem升级到最新版本也为 nil 。

ruby_version: 2.4.9
rails _version: 4.2.8

我的宝石文件

gem 'omniauth','1.9.1'
gem 'omniauth-oauth2','1.7.0'
gem 'omniauth-google-oauth2','0.8.0'

omniauth.rb

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :google_oauth2,'MY_GOOGLE_CLIENT_ID','MY_GOOGLE_SECRET',{
    scope: 'email,profile',access_type: "offline",approval_prompt: "force",prompt: 'select_account',redirect_uri: 'http://localhost:3000/auth/google-oauth2/callback'
  }

结束

routes.rb

get 'auth/google_oauth2/callback',to: 'social_accounts#create_account'

socual_accounts_controller.rb

class Api::V1::SocialAccountsController < ApplicationController

def create_account
  request_params = request.env["omniauth.auth"] # gives nil
end

end

是否可以从授权码中获取access_token和refresh_token？这也将有很大帮助

预先感谢