Single authorization for multiple databases, how?

Question

Laravel

There are two, three or more databases. They are identical in everything except the content.
How to authorize a user under the database he has chosen. That is, during authorization, the user has a form with the fields "Login, password, database" and, depending on the selected database, he is authorized.

Answer 1

https://laravel.com/docs/5.6/database#configuration
https://laravel.com/docs/5.6/configuration#accessi...
It doesn't hurt to read the documentation.