[Stinged]

Код:

new gAttempts[MAX_PLAYERS]; // A global array to store how many attempts the player has had

// When the player enters his password
// CHECK IF IT WAS INCORRECT
{
    gAttempts[playerid]++; // Adds 1 to the attempts count
    If (gAttempts[playerid] == 3) return Kick(playerid); // If the attempts equal 3, it kicks
    ShowPlayerDialog(Your incorrect dialog here)
}

Don't forget to reset gAttempts[playerid] (set it to 0) when the player connects or disconnects.