func userAuthorized() -> Bool {
        let username : String = UserDefaults.standard.string(forKey: "username") ?? ""
        let password : String = UserDefaults.standard.string(forKey: "password") ?? ""
//        let tokenSaved : String = UserDefaults.standard.string(forKey: "token") ?? ""
        var tempToken:String = ""

        if(!username.isEmpty && !password.isEmpty)
        {
             let json: [String: String] = ["username": username, "password": password]
            login(json: json) { [weak self] token in
                guard let self = self
                    else { return }
                guard let token = token, !token.isEmpty
                    else {
                        print("error")

                        return

                }
                print("ok")
                print(token)

                tempToken = token
                UserDefaults.standard.setValue(username, forKey: "userEmail");
                UserDefaults.standard.setValue(password, forKey: "userPassword");
                UserDefaults.standard.setValue(token, forKey: "token");
                UserDefaults.standard.synchronize();

        }
        }
        else
        {
            return false
        }
        if(!tempToken.isEmpty){
            return true
        }
        return false
   }

func login(json: Any, callback: @escaping (_ token: String?) -> ()) {
    guard let url = URL(string: ngrok+"/api/auth/token/create")else{return}
    var request = URLRequest(url: url)
    request.httpMethod = "POST"
    request.setValue("application/json", forHTTPHeaderField:"Content-Type")

    guard let httpBody = try? JSONSerialization.data(withJSONObject: json, options: [])else {return}
    request.httpBody = httpBody

    let session = URLSession.shared
    session.dataTask(with: request){(data, response, error) in //здесь обрывается
        if let response = response{
            print(response)
        }
        guard let data = data else{return}
        do{
            print(data)
            if let json_response = try JSONSerialization.jsonObject(with: data, options: [])as? [String:Any]{

                if let temp_token = json_response["auth_token"]{
                    print(temp_token as! String)
                    DispatchQueue.main.async {      callback(temp_token as? String)
                    }
                }
            }
        }

        catch{
            print(error)
        }
        }.resume()
}