protected void btbSettingsPasswortAendern_Click(object sender, EventArgs e)
{
int User_ID = Convert.ToInt32(txtSettingsPWaendernUserID.Text);
User Benutzer2 = new User(User_ID);
Benutzer2.changePWInDB(txtSettingsPasswortNeu.Text, txtSettingsPasswortNeuWdh.Text, txtSettingsPasswortalt.Text, User_ID);
}