// CLIENT EVENT
        private void onClientEventTrigger(Client player, string eventName, params object[] arguments)
        {
            if (eventName == "login")
            {
                string socialClubName = (string) arguments[0];
                string username = (string) arguments[1];
                string password = (string)arguments[2];

                API.triggerClientEvent(player, Database.PlayerDatabase.tryLogin(socialClubName, username, password));
            }
        }


using System;
using MySql.Data.MySqlClient;

namespace GermanRoleplay.Database
{
    class PlayerDatabase
    {

        public static string myConnectionString = "SERVER=localhost;" + "DATABASE=gta;" + "UID=root;" + "PASSWORD=;";
        public static MySqlConnection connection;
        public static MySqlCommand command;
        public static MySqlDataReader reader;

        public static string tryLogin(string socialClubName, string username, string password)
        {
            connection = new MySqlConnection(myConnectionString);
            command = connection.CreateCommand();
            command.CommandText = "SELECT * FROM players";

            connection.Open();
            reader = command.ExecuteReader();

            while (reader.Read())
            {
                string dbSocialClubName = reader.GetString("socialclubname");
                string dbUsername = reader.GetString("username");
                string dbPassword = reader.GetString("password");

                if ((socialClubName == dbSocialClubName) && (username == dbUsername) && (password == dbPassword))
                {
                    connection.Close();
                    return "LOGIN_SUCCESS";
                }
            }
            connection.Close();
            return "LOGIN_FAILED";
        }
    }
}