public void Authenticate()
        {
            var repositoryMock     = new Mock <IBusinessRepository>();
            var accountManagerMock = new Mock <IAccountManager <Business> >();

            accountManagerMock.Setup(x => x.Authenticate(business.Email, password, repositoryMock.Object)).Returns(new Business());

            IBusinessService businessService = new BusinessService(repositoryMock.Object, null, accountManagerMock.Object, null);

            Business result = businessService.Authenticate(business.Email, password);

            Assert.NotNull(result);
        }