```ruby
module Invitational
  module Generators
    class EntityGenerator < Rails::Generators::Base
      source_root File.expand_path('../templates', __FILE__)

      argument :identity_class, type: :string, default: "User", banner: "Class name of identity model (e.g. User)"
      argument :roles, type: :array, default: ["none", "user", "admin"], banner: "List of Roles"
    end
  end
end
```

Build the generator to setup an entity
user
```ruby
module Invitational
  module Generators
    class EntityGenerator < Rails::Generators::Base
      source_root File.expand_path('../templates', __FILE__)

      argument :entity_class, type: :string, banner: "Class name of entity class to which users will be invited"
      argument :roles, type: :array, default: ["role"], banner: "List of Valid Roles"

      def add_invitational_reference
        @entity_class = entity_class.gsub(/\,/,"").camelize
        @entity_model = @entity_class.underscore
        @path = "app/models/#{@entity_model}.rb"
        @role_list = roles.map{|role| ":" + role.gsub(/\,/,"")}.join(", ")

        content = "  include Invitational::AcceptsInvitationAs\n  accepts_invitation_as #{@role_list}\n "

        inject_into_class @path, @entity_class.constantize, content
      end

    end
  end
end
```
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