private void register_btn_Click(object sender, EventArgs e)
        {
            if (CheckIfTextValid())
            {
                if (doctor_radio.Checked || nurse_radio.Checked)
                {
                    OrclDatabase.RegisterNewStaffUser(newName_txt.Text, newUserName_txt.Text, newPassword_txt.Text, specialty_comboBox.SelectedItem.ToString(), selectedGender, userType, isPractitionerOrResident);
                }
                else if (patient_radio.Checked)
                {
                    OrclDatabase.RegisterNewPatientUser(newName_txt.Text, newUserName_txt.Text, newPassword_txt.Text, contactNumber_txt.Text, age_txt.Text, selectedGender);
                }

                this.Dispose();
                this.Close();
                MessageBox.Show("New user registered in Database", "Operation Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }