How can I force users to make a custom username upon first signin?

[LGmatrix13]

I want users to make their own username after first social auth signin. I plan to store this data in my database via the prisma adapter.

How, though, could I implement this? I’m thinking of making a data row called “setup” and setting it “false,” passing that into the next-auth session data, and on the front end tell users to setup a username if “setup” is “false.”

A few questions about this:

• How could I add a custom data (the row for “setup: false”) in sessions and have that be current in my database?
• How can I simultaneously update session data and database data once a user creates a username?

Thank you!!