code: func (api *API) UserDetails() (User, error) {
  	var r UserResponse
  	res, err := api.makeRequest("GET", "/user", nil)
  	if err != nil {
  		return User{}, errors.Wrap(err, errMakeRequestError)
  	}
  
  	err = json.Unmarshal(res, &r)
  	if err != nil {
  		return User{}, errors.Wrap(err, errUnmarshalError)
  	}
  
  	return r.Result, nil
  }
docs: // UserDetails provides information about the logged-in user.
  //
  // API reference: https://api.cloudflare.com/#user-user-details