mysql_query("CREATE TABLE IF NOT EXISTS playerdata(user VARCHAR(24), password VARCHAR(41), score INT(20), money INT(20),admin INT(4), IP VARCHAR(16) )");
    //Fields:

new PlayaAdmin[MAX_PLAYERS];

stock MySQL_Login(playerid)
{
    new query[300], pname[24], savingstring[20];
    GetPlayerName(playerid, pname, 24);
    format(query, sizeof(query), "SELECT * FROM playerdata WHERE user = '%s'", pname);
    //We only select the variables that we want to use.
    //We don't need things like the password string or the user string.
    mysql_query(query); //Queries the result
    mysql_store_result(); //Store a result because it's a SELECT statement.
    while(mysql_fetch_row_format(query,"|"))
    {
        //We use while so that it does a single query, not multiple
        //Especially when we have more variables. If there is more 
        //Variables, you should just split the line with sscanf. To 
        //Make it easier.
        mysql_fetch_field_row(savingstring, "score"); SetPlayerScore(playerid, strval(savingstring));
        mysql_fetch_field_row(savingstring, "money"); MoneyGiven[playerid] = strval(savingstring);
        //If you are wondering why I'm using savingstring instead
        //Of a variable like using MoneyGiven right away, it's because
        //mysql_fetch_field_row requires a string.
    }
    mysql_free_result(); //We must always free a stored result
    SendClientMessage(playerid, -1, "You have been logged in!"); //Sends the client a message.
    Logged[playerid] = 1; //Sets our logged in variable to one
    return 1;
}

mysql_fetch_field_row(savingstring, "admin"); PlayaAdmin[playerid] = strval(savingstring);

MoneyGiven[playerid] = strval(savestring);

public OnPlayerCommandText(playerid, cmdtext[])
{
    if (strcmp("/kick", cmdtext, true, 10) == 0)
    {
        new otherplayer;
        if(PlayaAdmin[playerid] >= 1 || IsPlayerAdmin(playerid))
        {
            if(sscanf(cmdtext,"u",otherplayer)) return SendClientMessage(playerid,0xFFFFFF00,"Usage: /kick [ID]");
            Kick(otherplayer);
        }
        else SendClientMessage(playerid,0xFFFFFF00,"SERVER: Unknown command.");
        return 1;
    }
    return 0;
}

mysql_query("CREATE TABLE IF NOT EXISTS playerdata(user VARCHAR(24), password VARCHAR(41), score INT(20), money INT(20), IP VARCHAR(16) )");

mysql_query("CREATE TABLE IF NOT EXISTS playerdata(user VARCHAR(24), password VARCHAR(41), score INT(20), money INT(20), IP VARCHAR(16), admin VARCHAR(2) )");

new IsAdmin[MAX_PLAYERS];

stock MySQL_Login(playerid)
{
    new query[300], pname[24], savingstring[20];
    GetPlayerName(playerid, pname, 24);
    format(query, sizeof(query), "SELECT * FROM playerdata WHERE user = '%s'", pname);
    mysql_query(query); //Queries the result
    mysql_store_result(); //Store a result because it's a SELECT statement.
    while(mysql_fetch_row_format(query,"|"))
    {
        mysql_fetch_field_row(savingstring, "score"); SetPlayerScore(playerid, strval(savingstring));
        mysql_fetch_field_row(savingstring, "money"); MoneyGiven[playerid] = strval(savingstring);
        mysql_fetch_field_row(savingstring, "admin"); IsAdmin[playerid] = strval(savingstring);
    }
    mysql_free_result();
    SendClientMessage(playerid, -1, "You have been logged in!");
    Logged[playerid] = 1;
    return 1;
}

if(IsAdmin[playerid] < 1) return SendClientMessage(playerid, 0xFF0000FF, "ERROR: You are not an admin, or your admin level is not enough!");

if(IsAdmin[playerid] < 1) // Change "1" number to the admin level you want