Data transfer with API

I show username in list with API. When any name is clicked, I want to get that user's information, but I can't see any text on the screen. I don't understand where I went wrong. I would be glad if you help.

JSON

struct HastaInsertModel: Codable {
  let ad, adres: String
  let changeby: Int
  let changedate, createdate, dogumyili, email: String
  let hastaid: Int
  let ilce: String
  let klinikid, kullaniciid: Int
  let phone, sehir, soyad: String
  let tcno: String?
  let ulke: String
  let yakinlik: String?
}

CODE

class Webservice 
  func getAllHastaInfo(token: String, email: String, completion: @escaping (Result<[HastaInsertModel], NetworkError>) -> Void){
     
    guard let url = URL(string: "http://ec2-3-74-42-117.eu-central-1.compute.amazonaws.com:8080/dentistodayapis/gethasta") else {
      completion(.failure(.invalidURL))
      return
    }
     
    var request = URLRequest(url: url)
    request.addValue("\(token)", forHTTPHeaderField: "credentialtoken")
    request.addValue("\(email)", forHTTPHeaderField: "username")

     
    URLSession.shared.dataTask(with: request) { (data, response, error) in

      guard let data = data, error == nil else {
        completion(.failure(.noData))
        return
      }
      do{
        let informations = try JSONDecoder().decode([HastaInsertModel].self, from: data)
        completion(.success(informations))
      } catch {
        print(String(data: data, encoding: .utf8))
      print(error)
      completion(.failure(.decodingError))
      }

    }.resume() 
  }

class PatientViewModel: ObservableObject {
  @Published var items = [HastaInsertModel]()
  @Published var hastalar: [HastaViewModel] = []
   
  func getHastaInfo() {
    let defaults = UserDefaults.standard
    guard let token = defaults.string(forKey: "jsonwebtoken") else {
      return
    }
    guard let email = defaults.string(forKey: "email") else {
      print("Haa")
      return
    }
     
    Webservice().getAllHastaInfo(token: token, email: email) { result in
      switch result {
         
      case .success(let hastalar):
        DispatchQueue.main.async {
          self.hastalar = hastalar.map(HastaViewModel.init)
        }
      case .failure(let error):
        print(error.localizedDescription)
      }
    }
     
  }
}


struct HastaViewModel{
   
   
  let hasta: HastaInsertModel
   
  let id = UUID()
   
  var ad: String {
    return hasta.ad
  }
   
  var adres: String {
    return hasta.adres
  }
   
  var dogumyili: String {
    return hasta.dogumyili
  }
   
  var email: String {
    return hasta.email
  }
   
  var ilce: String {
    return hasta.ilce
  }
   
  var phone: String {
    return hasta.phone
  }
   
  var sehir: String {
    return hasta.sehir
  }
   
  var soyad: String {
    return hasta.soyad
  }
   
  var tcno: String {
    return hasta.tcno ?? "empty"
  }
   
  var ulke: String {
    return hasta.ulke
  }
  var yakinlik: String {
    return hasta.yakinlik ?? "empty"
  }
   
}

   
  @StateObject private var patientVM = PatientViewModel()

   
  var body: some View {
     
    
        List {
          ForEach(patientVM.hastalar, id: \.id){ patient in
            NavigationLink {
              PatientDetail()
            } label: {
              VStack(alignment: .leading){
                Text(patient.ad)
                Text(patient.email).font(.caption).foregroundColor(.gray)
              }
               
            }
          }
           

           
        }

struct PatientDetail: View {
  @StateObject private var patientVM = PatientViewModel()
   
  var body: some View {
    VStack {
       
      Form {
         
        Section(header: Text("Kişisel Bilgiler")) {
          List (patientVM.hastalar, id:\.id){ patient in
            Text("\(patient.ad)d")
            Text("\(patient.soyad)")
            Text("\(patient.phone)")
            Text("\(patient.email)")
            Text("\(patient.dogumyili)")
            Text("\(patient.ulke)")
            Text("\(patient.sehir)")
            Text("\(patient.ilce)")
            Text("\(patient.adres)")
            Text("\(patient.tcno)")
          }
        }

For example, when I click "test new user", I show the patientdetail screen and I want to see the user's information.