code: func (api *Client) GetUserByEmailContext(ctx context.Context, email string) (*User, error) {
  	values := url.Values{
  		"token": {api.token},
  		"email": {email},
  	}
  	response, err := api.userRequest(ctx, "users.lookupByEmail", values)
  	if err != nil {
  		return nil, err
  	}
  	return &response.User, nil
  }
docs: // GetUserByEmailContext will retrieve the complete user information by email with a custom context