RDBMS user managment using Laravel

I'm setting up Gitlab CI/CD, to test and deploy a project that uses micro services. The service are build in Laravel and each runs in a Dockers container of their own. Each micro service has a dedicated database (MySQL) user. The users are only given permission to their respective tables and fields in the application database.

To handle the database migrations a separate Docker container/Laravel instance is used. This instance has a separate admin user with rights on the application database, but not on the mysql database(so it can't create users).

Now that deployment starts getting nearer I was looking in to the Gitlab CI/CD, so far I am only building test images but getting the right users in MySQL proofs challenging (but I managed). But I am stuck on how to manage the users in production...

Should I give the container that handles the migrations permission on the relevant mysql database tables and write migrations that use raw SQL using DB::statement() to insert (or remove) users and set the appropriate permissions? Is there a Laravel way here? One that lets you manage RDBMS users?

For the local develop/test environment there is a separate repro that stored all the files needed to start it. To create the database users for all the micro services a directory with .sql files is mounted in the /docker-entrypoint-initdb.d directory of the MySQL docker container. This is automatically loaded by the MySQL use to create all those users and grant them their privileges.