code: func (a *AuthWithRoles) GetRoles() ([]services.Role, error) {
  	if err := a.action(defaults.Namespace, services.KindRole, services.VerbList); err != nil {
  		return nil, trace.Wrap(err)
  	}
  	if err := a.action(defaults.Namespace, services.KindRole, services.VerbRead); err != nil {
  		return nil, trace.Wrap(err)
  	}
  	return a.authServer.GetRoles()
  }
docs: // GetRoles returns a list of roles