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: user_admin_rights.rb
    path of file: ./repos/open-build-service/src/api/lib/tasks
    
    the code of the file until where you have to start completion: class UserAdminRights
  attr_reader :user

  def i
    
  def toggle!
    raise NotFoundError unless user

    if user.roles.exists?(title: 'Admin')
      RolesUser.where(user: user, role: admin_role).first.destroy
    else
      user.roles << admin_role
    end