public async void FavortiesServiceTests_AddFavCurrency_Currency_Should_Not_Be_Added()
{
//Arrange
FavoritesService favoritesService = CreateFavoritesService();
ClaimsIdentity claims = new ClaimsIdentity(new Claim[] { new Claim(ClaimTypes.Name, _testUserName) });
ClaimsPrincipal user = new ClaimsPrincipal(claims);
int currencyId = _firstTestCurrencyId;
bool result = true;
//Act
result = await favoritesService.AddFavCurrency(currencyId, user);
//Assert
Assert.False(result);
}