whmcsProxmoxCloud/app/UI/Admin/Templates/assets/js/hooks/server.js

var ProxmoxCloudVps_td1;
var ProxmoxCloudVps_td2;
var ProxmoxCloudVps_accesshash;
var ProxmoxCloudVps_selectAdded = false;

function ProxmoxCloudVps_addSelect(){

    var accessTd = $(  "#inputServerType").closest("tbody").find(" tr:eq(3)").find(" td:eq(0)");
    ProxmoxCloudVps_td1 = accessTd.html();
    accessTd.html("Authentication");

    var accessInput = $(  "#inputServerType").closest("tbody").find(" tr:eq(3)").find(" td:eq(1)");
    ProxmoxCloudVps_td2 = accessInput.html();
    accessInput.html("<select name=\"accesshash\"><option value=\"pam\">Linux PAM standard authentication</option><option value=\"pve\">Proxmox VE authentication server</option><option value=\"PVEAPIToken\" hidden>API Tokens</option></select>");
    ProxmoxCloudVps_accesshash ? $("select[name='accesshash']").val(ProxmoxCloudVps_accesshash): $("select[name='accesshash']").val("pam")
    ProxmoxCloudVps_selectAdded = true;

}

function ProxmoxCloudVps_removeSelect(){
    $( "#inputServerType").closest("tbody").find(" tr:eq(3)").find(" td:eq(0)").html(ProxmoxCloudVps_td1);
    $(  "#inputServerType").closest("tbody").find(" tr:eq(3)").find(" td:eq(1)").html(ProxmoxCloudVps_td2);
    ProxmoxCloudVps_selectAdded = false
}

$(document).ready(function(){

    var pc_ServerType =  $( "#inputServerType").val();

    ProxmoxCloudVps_accesshash = $( "textarea[name='accesshash']").val();
    if(pc_ServerType=="ProxmoxCloudVps" || pc_ServerType=="ProxmoxCloudVps"){
        ProxmoxCloudVps_addSelect();
    }

    $( "#inputServerType").change(function(){
        pc_ServerType = $( this).val();

        if(ProxmoxCloudVps_selectAdded==true &&  pc_ServerType!="ProxmoxCloudVps" && pc_ServerType!="ProxmoxCloudVps"   ){
            ProxmoxCloudVps_removeSelect();
        }else if(!ProxmoxCloudVps_selectAdded && pc_ServerType=="ProxmoxCloudVps" || pc_ServerType=="ProxmoxCloudVps"  ){
            ProxmoxCloudVps_addSelect();
        }

    });
});