public async void Test_GivenAUser_WhenAddClaims_ThenResponseIsNotAltered()
        {
            userStoreMock.Setup(mock => mock.AddClaimsAsync(It.IsAny <CognitoUser>(), It.IsAny <IEnumerable <Claim> >(), It.IsAny <CancellationToken>())).Returns(Task.FromResult(IdentityResult.Success)).Verifiable();
            var output = await userManager.AddClaimsAsync(GetCognitoUser(), new List <Claim>()).ConfigureAwait(false);

            Assert.Equal(IdentityResult.Success, output);
            userStoreMock.Verify();
        }