[Desert]

This would be OnPlayerConnect

Код:

new name[MAX_PLAYER_NAME],file[23];
GetPlayerName(playerid,name,sizeof(name));
format(file,sizeof(file),"%s.ini");
if(fexist(file))
{
SendClientMessage(playerid,0xFFFFFF,"Welcome back! You have been automatically logged in!");
//Load the stuff
return 1;
}
if(!fexist(file))
{
SendClientMessage(playerid,0xFFFFFF,"You have not been registered! Please use /register");
return 1;
}

But i would not recommend using this as other players just needs to know the name of a player to gain hes stats. You could tho save the players IP on register and check if its the same