public async void ListMetadata()
        {
            var listMetadataResult = await _metadataClient.ListMetadata("CustomObject");

            Assert.IsNotNull(listMetadataResult);
            Assert.IsNotNull(listMetadataResult.Result);

            listMetadataResult = await _metadataClient.ListMetadata("ApexClass");

            Assert.IsNotNull(listMetadataResult);
            Assert.IsNotNull(listMetadataResult.Result);

            listMetadataResult = await _metadataClient.ListMetadata("Profile");

            Assert.IsNotNull(listMetadataResult);
            Assert.IsNotNull(listMetadataResult.Result);

            //AuraDefinitionBundle
            listMetadataResult = await _metadataClient.ListMetadata("AuraDefinitionBundle");

            Assert.IsNotNull(listMetadataResult);
            Assert.IsNotNull(listMetadataResult.Result);
        }