User Authentication - sign-up / sign-in / login / logout

[chenyyxx]

• add next-auth , and use it to for user authenticating
• design the user interface for login/signup/sign-in
• add prisma for ORM, and use the prisma adapter with next-auth
• design data model
• migrate the model
• set up AWS postgressql db and hook it up with prisma

[chenyyxx]

Finished