public void Invoke_GetOutputFileTypesAsync_Returns_Result()
        {
            HasClientCredentials();

            Dictionary <string, OutputFileType> result = null;

            Assert.That(async() => result = await _auphonic.GetOutputFileTypesAsync(), Throws.Nothing);
            Assert.That(result, Is.Not.Null);
            Assert.That(result.Count, Is.GreaterThan(0));
        }