Custom fields in Registration popup v4

functions.php

//Add custom field
add_filter('vibebp_vars',function($vars){
    $vars['settings']['registration_fields'][]=['type'=>'text','id'=>'XXXXX','label'=>_x('WPLMS Purchase Code','login','vibebp'),'value'=>'','class'=>'input'];
    return $vars;
});

//Process custom field
add_filter('vibebp_register_user_bypass',function($flag,$body){
    foreach($body as $key => $value){
        if($value['type'] == 'password'){
            if(empty(sanitize_text_field($value['value'])))
                return 0;
        }
        if($value['type'] == 'email'){
            if(empty(sanitize_text_field($value['value'])))
                return 0;
        }
        if($value['id'] == 'XXXXX'){

            if(empty($purchase_code)){
                return 0;
            }else{

                //Perform action
                    return 1;
                
            }
        }
    }
	return 0;
},10,2);