omniauth_controller.rb

def sign_in_oauth_from_provider
    result = AuthenticateUser.call(omniauth: request.env['omniauth.auth'])
    #@user = User.find_for_oauth(request.env['omniauth.auth'])
    #if @user.persisted?
    if result.success?
      sign_in_and_redirect @user, event: :authentication
      set_flash_message(:notice, :success, kind: @provider_auth) if is_navigational_format?
    end
  end


  INTERACTOR

  class AuthenticateUser
  include Interactor

  def call
    context.omniauth
    if context.save
      context.sucess(message: 'omniauth true')
      authorization = OauthProvider.where(provider: auth.provider, uid: auth.uid.to_s).first
      return authorization.user if authorization

      email = auth.info[:email]
      user = User.where(email: email).first
      if user
        user.oauth_providers.create(provider: auth.provider, uid: auth.uid)
      else
        password = Devise.friendly_token[0, 20]
        user = User.create!(email: email, password: password, password_confirmation: password)
        user.oauth_providers.create(provider: auth.provider, uid: auth.uid)
      end
    user
    #  context.sucess(message: 'omniauth true')
    else
      context.fail!
    end
  end
end

Error
OmniauthCallbacksController#github is missing a template for this request format and variant. request.formats: ["text/html"] request.variant: [] NOTE! For XHR/Ajax or API requests, this action would normally respond with 204 No Content: an empty white screen. Since you're loading it in a web browser, we assume that you expected to actually render a template, not nothing, so we're showing an error to be extra-clear. If you expect 204 No Content, carry on. That's what you'll get from an XHR or API request. Give it a shot.