groupsproperty has the Filter set to Matches Regex with the value set to
Formio.ssoInitmethod is used to both instigate the SSO process as well as handle the callback once the authentication occurs. Because of this, it may be beneficial to place this code within a button so that the login will occur once you click on a "Login" button, and then trigger the
Formio.ssoInitmethod once the page returns with the
?saml=query parameter (which indicates that the SSO process has completed).