AJAX als Funktion

let promise = check_login();
promise.success(function (data) {
  //console.log(data);
  if(data["loggedin"] === 1){
  }
});

function check_login(){
    return jQuery.ajax(
      {
        url: "../custom_scripts/api/user/get_user_info.php",
        type: 'GET',
        dataType: 'json',
      }
    );
}