public async Task DeleteCredentialThrowsIfIdMissing()
{
object errorResponse = null;
var contextMock = RequestContextMocks.Create <bool>(null).AddErrorHandling((msg, code) => errorResponse = msg);
// Verify throws with no ID
await service.HandleDeleteCredentialRequest(new Credential(), contextMock.Object);
TestUtils.VerifyErrorSent(contextMock);
Assert.True(((string)errorResponse).Contains("ArgumentException"));
}