Im trying to POST the following API using C# when a user presses a button on a form. However no idea where to start. Can anyone help ?
Button Code
private void Okta_Click(object sender, RoutedEventArgs e)
{ }
POST : https://test.okta.com/api/v1/authn
Body
{
    "username": "user",
    "password": "password",
    "options": {
        "multiOptionalFactorEnroll": true,
        "warnBeforePasswordExpired": true
    }
}
When the user presses the button, it should add the user to the application.