FireStore how can I get all FAVOURITES collection where UID = currentUser.uid?

I have tried the following:

let data = FirebaseManager.shared.firestore.collection("favourites").where("uid", "==", user?.uid).get()
    print(data)

and I get: Value of type 'CollectionReference' has no member 'where'

Please help?

My new View has lots of errors in

import SwiftUI
import Firebase

struct FavouritesListView: View {
  func getUsersFavourites() {
    var user = FirebaseManager.shared.auth.currentUser

    let data = FirebaseManager.shared.firestore.collection("favourites").where("uid", "==", user?.uid).get()
    print(data)
  }
  var body: some View {
    self.getUsersFavourites()
  }
}

struct FavouritesListView_Previews: PreviewProvider {
  static var previews: some View {
    FavouritesListView()
  }
}

Type '()' cannot conform to 'View'

is anyone able to help me out here please?

FireStore how can I get all FAVOURITES collection where UID = currentUser.uid?
 
 
Q