public void Remove(User usersToBeRemoved)
{
Users.Remove(usersToBeRemoved);
PersistencyServiceUser.SaveEventsAsJsonAsync(Users);
}
public void Add(string userName, string passWord, string firstName, string lastName, string phonenumber)
{
Users.Add(new User(userName, passWord, firstName, lastName, phonenumber));
PersistencyServiceUser.SaveEventsAsJsonAsync(Users);
}