Simultaneous (bulk) authorization on multiple Laravel sites?

Question

User identification

Tell me, share your experience on how to make simultaneous (mass) authorization on several Laravel sites? For example, there are two sites, I log in on one - on the second, too, but automatically, and vice versa.
How to properly organize the database structure, how to use sessions?

Answer 1

Google info on SSO (Single Sign On).

Answer 2

Use jwt tokens. Log in to one server. Use on all projects.
https://jwt.io
https://github.com/tymondesigns/jwt-auth/blob/deve...