I would like to customize the registration completion email for Device, but a 555 5.5.2 Syntax error appears and I cannot send it.

#frozen_string_literal:true

class Users::RegistrationsController <Device::RegistrationsController

　# from here

  # qiita-ActionMailer Reference
  def create
    # Call create action for superclass (devise)
    super
    # Call the send_when_signup method of the WelcomeMailer class and pass the user's email and name received from POST.
    WelcomeMailer.send_when_signup(params[:user][:email], params[:user][:name]).deliver
  end

　# That's it.

  # before_action: configure_sign_up_params, only: [:create]
  # before_action: configure_account_update_params, only: [:update]

  # GET/resource/sign_up
  # def new
  #   super
  # end

  # POST/resource
  # def create
  #   super
  # end

  # GET/resource/edit
  # default
  #   super
  # end

  # PUT/resource
  # default update
  #   super
  # end

  # DELETE/resource
  # def destroy
  #   super
  # end

  # GET/resource/cancel
  # Forces the session data which is userally expired after sign
  # in to be expired now. This is useful if the user wants to
  # cancel oauth signing in/up in the middle of the process,
  # removing all OAuth session data.
  # def cancel
  #   super
  # end

  # protected

  # If you have extra params to permit, append them to the sanitizer.
  # def configure_sign_up_params
  #   device_parameter_sanitizer.permit(:sign_up, keys:[:attribute])
  # end

  # If you have extra params to permit, append them to the sanitizer.
  # def configure_account_update_params
  #   device_parameter_sanitizer.permit(:account_update, keys:[:attribute])
  # end

  # The path used after sign up.
  # after_sign_up_path_for (resource)
  #   super(resource)
  # end

  # The path used after sign up for inactive accounts.
  # after_inactive_sign_up_path_for (resource)
  #   super(resource)
  # end
end

#Additional or Changed
  config.action_mailer.default_url_options={ host:'localhost', port:3000}
  # qiita-ActionMailer --
  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors=true
  config.action_mailer.delivery_method=: smtp
  config.action_mailer.smtp_settings={
    port:587,
    address: 'smtp.gmail.com',
    domain: 'smtp.gmail.com',
    user_name : ENV ['WELCOME_MAILER_ADDRESS',
    password:ENV['WELCOME_MAILER_PASSWORD',
    authentication: 'login',
    enable_starttls_auto —true
  }