public void zalogujProfil()
        {
            string log;
            string pass;
            try
            {
                User us=new User();

                Console.CursorVisible = false;
                Console.SetCursorPosition(0, 0);
                Console.WriteLine("______________________", Color.DarkCyan);

                Console.SetCursorPosition(0, 2);
                Console.WriteLine("LOGOWANIE UŻYTKOWNIKA");

                Console.SetCursorPosition(0, 3);
                Console.WriteLine("______________________", Color.DarkCyan);

                Console.SetCursorPosition(0, 6);

                StreamReader loadFileUser = new StreamReader("Profile.txt");


                 string line;
                 while ((line = loadFileUser.ReadLine()) != null)
                 {
                     User load1 = JsonConvert.DeserializeObject<User>(line);
                     Console.Write("Login: ");
                     log = Console.ReadLine();
                     if (log.Length <= 0 || log!=load1.login)
                     {
                         do
                         {
                             Console.WriteLine("Login nieprawidlowy");
                             Console.Write("Login: ");
                             log = Console.ReadLine();
                         } while (log.Length <= 0 || log != load1.login);

                     }

                 Console.Write("Hasło: ");
                 pass = "";
                 ConsoleKeyInfo keyInfo;
                 do
                 {
                     keyInfo = Console.ReadKey(true);
                     // Skip if Backspace or Enter is Pressed
                     if (keyInfo.Key != ConsoleKey.Backspace && keyInfo.Key != ConsoleKey.Enter)
                     {
                         pass += keyInfo.KeyChar;
                         Console.Write("*");
                     }
                     else
                     {
                         if (keyInfo.Key == ConsoleKey.Backspace && pass.Length > 0)
                         {
                             // Remove last charcter if Backspace is Pressed
                             pass = pass.Substring(0, (pass.Length - 1));
                             Console.Write("\b \b");
                         }
                     }
                 }
                 // Stops Getting Password Once Enter is Pressed
                 while (keyInfo.Key != ConsoleKey.Enter);

                 if ( load1.haslo!=pass || pass.Length <= 0)
                 {
                     do
                     {
                         Console.WriteLine("\nHaslo nieprawidlowe.");
                         Console.Write("Hasło: ");
                             pass = "";
                             do
                         {
                             keyInfo = Console.ReadKey(true);
                             if (keyInfo.Key != ConsoleKey.Backspace && keyInfo.Key != ConsoleKey.Enter)
                             {
                                 pass += keyInfo.KeyChar;
                                 Console.Write("*");
                             }
                             else
                             {
                                 if (keyInfo.Key == ConsoleKey.Backspace && pass.Length > 0)
                                 {
                                     pass = pass.Substring(0, (pass.Length - 1));
                                     Console.Write("\b \b");
                                 }
                             }
                         }
                         while (keyInfo.Key != ConsoleKey.Enter);
                     } while (load1.haslo != pass || pass.Length <= 0);
                 }
                     foreach (User use in profileList)
                     {
                         if (use.login == log && use.haslo==pass)
                         {
                             this.imie = use.imie;
                             this.nazwisko = use.nazwisko;
                             this.waga = use.waga;
                             this.wzrost = use.wzrost;
                             this.dataUr = use.dataUr;
                             this.wiek = use.wiek;
                             this.aktywnosc = use.aktywnosc;
                             this.login = use.login;
                             this.plec = use.plec;
                             this.haslo = use.haslo;
                             this.BMI = use.BMI;
                             this.kg = use.kg;
                             this.CPM = use.CPM;
                             this.newCPM = use.newCPM;
                         }
                     }

                     Console.SetCursorPosition(0, 16);
                     loadFileUser.Close();
                     break;
                 }


            }
            catch (FormatException)
            {
                Console.WriteLine("Wprowadziles zle dane");
            }

        }