External Login integration

I need to authenticate a user without passing by login form. I have an external auth via SPID.

The SPID, which stands for Sistema Pubblico di Identità Digitale (Public Digital Identity System), is an Italian digital identity system that allows citizens to access online services of the public administration and private members with a unique digital identity. This system provides a secure, standardized, and simplified method for user authentication and access to various services.

So we authorized the digital entity of the user and retrieve his information, without a password, then we are redirected to Shopify without a session active and we don’t wanna pass through login.

There is any way to achieve this scenario?

Hello @Scamar70

Direct functionality isn’t available in Shopify, you’ll need to create a custom app and then log in through the custom app.
If your Shopify plan includes Shopify Plus, you can utilize the multipass functionality for login. This involves storing the email, SPID, and customer ID in a database when a customer creates an account. Then, when a user enters their SPID, the system searches for the associated email and logs them in using multipass. If you don’t have a Shopify Plus Plan, you’ll need to create a custom login system for your store.