anchor.diff:    * @docs https://sendgrid.api-docs.io/v3.0/link-branding/validate-a-branded-link
     * @hint Validate a branded link
     * @id The id of the branded link you want to delete.
  -  * @on_behalf_of The subuser's username. This header generates the API call as if the subuser account was making the call
  +  * @on_behalf_of generates the API call as if the subuser account was making the request
     */
     public struct function validateLinkBranding(  required numeric id = 0, string on_behalf_of = '' ) {
       return apiCall( 'POST', "/whitelabel/links/#id#/validate", {}, {}, parseSubUser( on_behalf_of ) );
  
positive.code:   * @docs https://sendgrid.api-docs.io/v3.0/domain-authentication/delete-an-authenticated-domain
    * @hint Delete an authenticated domain.
    * @domain_id The id of the branded link you want to delete.
    * @on_behalf_of The subuser's username. This header generates the API call as if the subuser account was making the call
    */
    public struct function deleteAuthenticatedDomain( required numeric domain_id = 0, string on_behalf_of = '' ) {
      return apiCall( 'DELETE', "/whitelabel/domains/#domain_id#", {}, {}, parseSubUser( on_behalf_of ) );
  
negative.code:   /**
    * @docs https://sendgrid.api-docs.io/v3.0/users-api/retrieve-your-account-email-address
    * @hint Retrieve your account email address
    * @on_behalf_of generates the API call as if the subuser account was making the request
    */
    public struct function getUserEmail( string on_behalf_of = '' ) {
      return apiCall( 'GET', "/user/email", {}, {}, parseSubUser( on_behalf_of ) );
  