[***Niko***]

There you go

pawn Код:

public OnPlayerConnect(playerid)
{
    if(PlayerInfo[playerid][pAdmin] >= 1 || IsPlayerAdmin(playerid)) // define your Admin enum i made it as pAdmin
    {
        new name[ 24 ], string[ 64 ];
        GetPlayerName( playerid, name, 24 );
        format( string, sizeof(string), "{FF0000}[Administrator] %s {00FFFF}has joined {FF0000}[Server Name]!", name );
        SendClientMessageToAll(COLOR_WHITE,string);
        return 1;
    }
}