在twitter omniauth中创建没有电子邮件和密码的设备用户

Question

我想在设计中“注册Twitter”。我正在使用twitter-omniauth。即使我不需要它，我也无法收到电子邮件。但是设计不允许在没有电子邮件的情况下创建帐户。

User.rb

def self.from_omniauth(auth)
  where(provider: auth.provider, uid: auth.uid).first_or_create! do |user|
    user.email = auth.info.email
    user.password = Devise.friendly_token[0,20]
  end
end

omniauth_controller.rb

def twitter
  auth = env["omniauth.auth"]

  @user = User.from_omniauth(request.env["omniauth.auth"])
  if @user.persisted?
    sign_in_and_redirect @user, :event => :authentication
    set_flash_message(:notice, :success, :kind => "Twitter") if is_navigational_format?
  else
    session["devise.twitter_uid"] = request.env["omniauth.auth"]
    redirect_to new_user_registration_url
  end
end

我该怎么办？