class UserModel : Codable, Identifiable{

var id: String? = nil
var email: String?
var name: String?
var pfpUrl: String?
var roles: [Roles]?

  init(email: String, name: String, pfpUrl: String, roles: [Roles]) {
    self.email = email
    self.name = name
    self.pfpUrl = pfpUrl
    self.roles = roles
  }

 }

struct Roles: Codable {

var role: String?
var vkNumber: String?

enum CodingKeys: String, CodingKey{
    case role = "student"
    case vkNumber = "800000015"

}

extension DocumentSnapshot {

func decode<T: Decodable>(as objectType: T.Type, includingId: Bool = true) throws  -> T {

    var documentJson = data()
    if includingId {

        documentJson?["id"] = documentID
    }

    let documentData = try JSONSerialization.data(withJSONObject: documentJson ?? "null", options: [])
    let decodedObject = try JSONDecoder().decode(objectType, from: documentData)

    return decodedObject
}