You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: authentication_generator.rb
    path of file: ./repos/godmin/lib/generators/godmin/authentication
    
    the code of the file until where you have to start completion: require "godmin/generators/named_base"

class Godmin::AuthenticationGenerator < Godmin::Generators::NamedBase
  argument :name, type: :string, default: "admin_user"

  def create_model
    generate "model", "#{name} email:string
    
  def modify_model
    inject_into_file File.join("app/models", class_path, "#{file_name}.rb"), after: "ActiveRecord::Base\n" do
      <<-END.strip_heredoc.indent(namespace ? 4 : 2)
        include Godmin::Authentication::User

        def self.login_column
          :email
        end
      END
    end
  end