Certilia Identity Provider is a free service that allows you to log in to your web and mobile applications in just a few seconds.
The service uses the OAuth2/OpenID Connect standard, making it extremely easy to integrate and suitable for almost all web and mobile applications.
Technically, the entire process works like logging in with a Google or Facebook account, with the difference that Certilia IDP returns official and verified data of the user who is logging in (name, surname, OIB, and other details).
The application owner determines which data to request from the user. During the first login, the user sees the requested data and gives consent for its submission
More on: https://www.certilia.com/
