public void GetSha512String_HappyFlow()
    {
        // Arrange
        var input          = "test 123";
        var expectedOutput = "RNiw9ZCfWvIt1SyjF8exd7hnDQHw8KK1iVcbqV+fyPt6yij3RnZkJS1SsuEmtxH4jjllJO4f3HK3Rjp0hKIcbw==";

        // Act
        var result = HashingUtilities.GetSha512String(input);

        // Assert
        Assert.AreEqual(expectedOutput, result);
    }
 private static string CreateHash(string username, string password) =>
 HashingUtilities.GetSha512String($"{Salt}:{username}:{password}");