Multi Domain Next Js Prisma Next-Auth

[laurent512]

Hello,

Techno stack : next js, prisma, postgresql, next-auth

My project uses one single database containing all info ( user, session, project specific data).
Ideally I would like to have the following website structure :

admin.mysite.com : admin portal , only admin can loggin , admin specific information should be fetched from db
user.mysite.com : admin portal , only users can loggin , user specific information should be fetched from db
api.mysite.com : public information (project specific data) should be accssible publicly
With next JS, we can not work with different subdomains so each site must be separated( please let me know if I am wrong)
So I am struggling about how to organize my site to avoid prisma code redundancy and ensure security.

I am thinking to put all the prisma logic and set up all needed api's in apy.mysite.com , but is there a way to ensure security easily between two sub domains (e.g. can I check at api.mysite.com that an admin requesting his profile picture is indeed logged as admin) ?

Thank you so much in advance for your help 🤝