public async Task CredentialsFileCreatedAndDeletedTest()
        {
            CredentialsRepository credentialsRepository = new CredentialsRepository();

            var credentials = new Credentials
            {
                UserName = "******",
                Password = "******"
            };

            await credentialsRepository.SaveCredentialsAsync(credentials).ConfigureAwait(false);

            Assert.IsTrue(System.IO.File.Exists(_filePath));

            credentialsRepository.Dispose();

            Assert.IsFalse(System.IO.File.Exists(_filePath));
        }