private void ChangeInfomationLabel()
        {
            switch (usernameChange.IsUsernameTaken(textBox1.Text))
            {
            case 0:
                label2.Text      = "Username is avaliable";
                label2.ForeColor = System.Drawing.Color.Green;
                break;

            case 1:
                label2.Text      = "Username is already taken";
                label2.ForeColor = System.Drawing.Color.Red;
                break;

            case 2:
                label2.Text      = "Username is too long";
                label2.ForeColor = System.Drawing.Color.Red;
                break;

            case 3:
                label2.Text      = "Username is too short";
                label2.ForeColor = System.Drawing.Color.Red;
                break;

            case 4:
                label2.Text      = "Username contains spaces";
                label2.ForeColor = System.Drawing.Color.Red;
                break;

            default:
                label2.Visible = false;
                break;
            }
            label2.Visible = true;
        }
        private void UsernameTextBox_TextChanged(object sender, EventArgs e)
        {
            switch (changeUsername.IsUsernameTaken(UsernameTextBox.Text))
            {
            case 0:
                label4.Text      = "Username is avaliable";
                label4.ForeColor = System.Drawing.Color.Green;
                break;

            case 1:
                label4.Text      = "Username is already taken";
                label4.ForeColor = System.Drawing.Color.Red;
                break;

            case 2:
                label4.Text      = "Username is too long";
                label4.ForeColor = System.Drawing.Color.Red;
                break;

            case 3:
                label4.Text      = "Username is too short";
                label4.ForeColor = System.Drawing.Color.Red;
                break;

            case 4:
                label4.Text      = "Username contains spaces";
                label4.ForeColor = System.Drawing.Color.Red;
                break;

            default:
                label4.Visible = false;
                break;
            }

            label4.Visible = true;
        }