Support Single Sign-On (SSO)

Like for accountants https://help.pennylane.com/fr/articles/18741-ajouter-un-collaborateur-et-gerer-ses-droits#h_b4d8fc6ef0, it would be great for the customers to be able to use SSO to sign into their acccouts. A big bonus for making it possible to enforce this as the only way to sign-in. For example, we have 2FA enforce in our Google Workspace.