code: func MatchLogin(selectors []string, login string) (bool, string) {
  	for _, l := range selectors {
  		if l == login {
  			return true, "matched"
  		}
  	}
  	return false, fmt.Sprintf("no match, role selectors %v, login: %v", selectors, login)
  }
docs: // MatchLogin returns true if attempted login matches any of the logins.