Native types for enums

Hi,
I would like to add a native type to an enum field. Like that :

enum Role {
  USER
  ADMIN
}
model User {
  role Role @db.VarChar(191)
}

enum Role {
  USER
  ADMIN
}
model User {
  role Role @db.VarChar(191)
}

But when I do a

prisma generate

prisma generate

I get the following error :

Attribute not known: "@db.VarChar".

Attribute not known: "@db.VarChar".

Are native types supported for enums?

Native types for enums - Prisma