[John_F]

pawn Код:

public OnPlayerConnect(playerid)
{
    if (dini_Exists(udb_encode(playername)))
    {
    SendClientMessage(playerid,COLOR_RED,"Please login! Use /login [Password]");
    }
    else SendClientMessage(playerid,COLOR_RED,"Ur not registered! Please use /register [Password]");
       
    logged[playerid] = 0;
    new name[MAX_PLAYER_NAME],string[32];
    SetPlayerColor(playerid, COLOR_PINK);
    GetPlayerName(playerid,name,sizeof(name));
    format(string,sizeof(string),"%s has joined the server",name);
    SendClientMessageToAll(COLOR_GREY,string);
    return 1;
}

You need brackets for if statements.