public async Task GivenAListOfUsers_WhenGetAllUsers_ThenReturnListOfUsersEntity()
{
var user = UserFactory.Added2Users(_database.DbContext);
var result = await _repository.GetAllAsync();
result.Should().BeOfType <List <User> >();
var addedUser = result.FirstOrDefault(u => u.Id == user.Id);
addedUser.Should().NotBeNull();
}