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

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

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

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

            var credentialsFromFile = await credentialsRepository.GetCredentialsAsync().ConfigureAwait(false);

            Assert.AreEqual(credentials.UserName, credentialsFromFile.UserName);
            Assert.AreEqual(credentials.Password, credentialsFromFile.Password);
        }