buy Skin system

#include a_samp
#include Ldudb
#include zcmd

enum info
{
useingskin,
skin,
}

new pskin[MAX_PLAYERS][info];

#define DIALOG_skin 981

CMD:buyskin(playerid,params[])
{
    ShowPlayerDialog(playerid, DIALOG_skin, DIALOG_STYLE_INPUT,"{00FFFF}Welcome To Dialog Buy Skin","{00FFFF}Enter skin id for pick it up", "Enter","Exit");
    return 1;
}

CMD:dontuseskin(playerid,params[])
{
dUserSetINT(pdata(playerid)).("useingskin",0);
SendClientMessage(playerid, 0xFFFF00AA, "useing Skin canceled.");
return 1;
}
public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    if(dialogid == DIALOG_skin )
    {
        if(response)
        {
            new string[128];
            new skinid = strval(inputtext);
            if(!strlen(inputtext)) return ShowPlayerDialog(playerid, DIALOG_skin, DIALOG_STYLE_INPUT,"{00FFFF}Welcome To Dialog Buy Skin","{00FFFF}Please Enter skin id", "Enter","Exit");
            if(skinid < 0 || skinid > 311)
            {
            ShowPlayerDialog(playerid, DIALOG_skin, DIALOG_STYLE_INPUT,"{FF0000}Invalid skin id","{FF0000}Invalid skinid please Enter another skin id", "Enter","Exit");
            return 1;
            }
            else {
                dUserSetINT(pdata(playerid)).("useingskin",1);
                dUserSetINT(pdata(playerid)).("skin",skinid);
                SetPlayerSkin(playerid, skinid);
                format(string, sizeof(string), "Skin id: %d successfully picked.", skinid);
                SendClientMessage(playerid, 0xFFFF00AA, string);
                return 1;
               }
            } else { SendClientMessage(playerid, 0xFFFF00AA, "Skin selection canceled.");
         }
       }
    return 0;
 }

public OnPlayerConnect(playerid)
{
new rname[MAX_PLAYER_NAME];
GetPlayerName(playerid,rname,sizeof(rname));
if (udb_Exists(pdata(playerid))) return pskin[playerid][skin] = (dUserINT(pdata(playerid)).("skin"));
GetPlayerName(playerid,rname,sizeof(rname));
if(!udb_Exists(pdata(playerid))) udb_Create(pdata(playerid), "");
{
dUserSetINT(pdata(playerid)).("skin",0);
dUserSetINT(pdata(playerid)).("useingskin",0);
}
return 1;
}
public OnPlayerSpawn(playerid)
{
    if((dUserINT(pdata(playerid)).("useingskin")) == 1) {
    SetPlayerSkin(playerid,dUserINT(pdata(playerid)).("skin"));
    }
    return 1;
}

pdata(playerid) {
  new pname[MAX_PLAYER_NAME];
  GetPlayerName(playerid, pname, sizeof(pname));
  return pname;
}