[CreativityLacker]

pawn Код:

public OnPlayerConnect(playerid)
{
    if(strcmp("Excelize", pname(id), false) == 0 && IsPlayerNPC(playerid) == 0)
    {
          SendClientMessageToAll(-1, "Server owner Excelize has joined the server! ");
    }
    return 1;
}

UNLESS you have a SAVING SYSTEM which LOADS whenever a player CONNECTS (mostly saving systems load after the player's LOGIN), then it can be what Rayan said.