Problems with ForEach, SwiftUI

Code Block 
import SwiftUI
import Combine
struct ContentView: View {
    
    @EnvironmentObject var networkController: NetworkControllerItalia
    
    var body: some View {
        Form{
            TextField("Input city name", text: $networkController.cityName)
            Section {
                ForEach(networkController.users.weather, id: \.self){ user in
                }
            }
        }
    }
}
class NetworkControllerItalia: ObservableObject {
    private var can: AnyCancellable?
    @Published var cityName: String = ""
    @Published var users = [UserItalia(weather: Weather())]
    
    init(cityName: String) {
        self.cityName = cityName
        
        let url = URL(string: "http://api.openweathermap.org/data/2.5/weather?q=\(cityName)&appid=")!
        
        self.can = URLSession.shared.dataTaskPublisher(for: url)
            .map { $0.data }
            .decode(type: [UserItalia].self, decoder: JSONDecoder())
            .eraseToAnyPublisher()
            .receive(on: DispatchQueue.main)
            .sink(receiveCompletion: {completion in
                print(completion)
            }, receiveValue: { users in
                self.users  = users
            })
    }
}
struct UserItalia: Decodable, Hashable{
    var weather: Weather
}
struct Weather: Decodable, Hashable {
    var main: String?
}