Prisma adapter with custom User model and local createdAt datetime

[AeroFiTech]

I have tried to look around but could not find a similar discussion yet on how do we design a custom User Model for NextAuth.

This is the custom User Model (last three items are custom field query from db):
model User {
id String @id @default(cuid())
name String?
email String? @unique
emailVerified DateTime?
image String?
accounts Account[]
sessions Session[]
role String
status String
createdAt DateTime @default(now())
}

Two questions:

1. Can we append the default User Model as such?
   Otherwise, is it recommended to introduce the new fields into a new table?

2. Can we default the datetime to our local timezone? As it is defaulted to UTC+0 now.