public void ChangeFullName_Test()
{
RegisteredUser user = new RegisteredUser();
user.ChangeInfo("Mark", "Krava");
Assert.That(user.FirstName == "Mark" && user.LastName == "Krava");
}
public void ChangePassword_Test()
{
RegisteredUser user = new RegisteredUser();
user.ChangeInfo("45678765");
Assert.That(user.Pasword == "45678765");
}