[dr.lozer]

do like this

pawn Код:

public OnPlayerRequestSpawn(playerid)
{
   if(PlayerInfo[playerid][LoggedIn] == 0) // People use this kind of functions :P you must use your own!
   {
      SendClientMessage(playerid, COLOR_RED,"ERROR: Your not loggedin to get spawn");
      return 0;
   }
   return 1;
}

public OnPlayerCommandReceived(playerid, cmdtext[])
{
    /*if (!IsPlayerSpawned(playerid)) we dont need this 
    {*/
    if (!strcmp(cmdtext, "/login", true)) // you forgot to put ! in there
    {