fab-manager/app/controllers/registrations_controller.rb

class RegistrationsController < Devise::RegistrationsController
  # POST /resource
  def create
    build_resource(sign_up_params)

    resource_saved = resource.save
    yield resource if block_given?
    if resource_saved
      if resource.active_for_authentication?
        set_flash_message :notice, :signed_up if is_flashing_format?

        # Allows sending the confirmation email without blocking the access to the dashboard
        resource.send_confirmation_instructions

        sign_up(resource_name, resource)
        respond_with resource, location: after_sign_up_path_for(resource)
      else
        set_flash_message :notice, :"signed_up_but_#{resource.inactive_message}" if is_flashing_format?
        expire_data_after_sign_in!
        respond_with resource, location: after_inactive_sign_up_path_for(resource)
      end
    else
      clean_up_passwords resource
      respond_with resource
    end
  end

end