private static function exists($username, $password)
		{
			$connection = new mysqli('localhost','root','','tema3');
			$query = 'SELECT * from users';

			$result = $connection->query($query);
			$ok = 0;

			if ($result)
            {
				while ($row = $result->fetch_assoc() )
				{
					//echo "gigi";
					//sprint_r($row);
					if ($row['password'] == md5($password) && $row['username'] == $username)
					{
						$ok = 1;
						break;
					}
				}
			}
			//echo $ok;
			if ($ok == 1)
			{
				return true;
			}
			else
			{
				return false;
			}
		}



		public function actionIsset ()
		{
			if (!isset($_POST))
			{
				return false;
			}
			$user = $_POST["username"];
			$pass = $_POST["password"];

			if (empty($user) || empty($pass))
			{
				return false;
			}

			return ($this->exists($user, $pass));
		}