public void CanHashValues()
        {
            var pass1 = "FeKI*9IZlcQ2Bk$;EEUx";
            var salt1 = "7wEPvh7KFgIX3B1vo1McOPYhkVLUQipLnwZuHEL2l5hAwfGVDjHPTFCtuNVqh33qFfrdboxqidBTKZWtlaJuTSIrS6vvVz7fRktdracm0Q1WBDFNuRnwStmgbYv7bZcV";

            var saltedHasher = new Sha256SaltedHasher();
            var hash1        = saltedHasher.GetHashBytesString(pass1, salt1);
            var hash2        = saltedHasher.GetHashBytesString(pass1, salt1);

            Assert.NotEmpty(hash1);
            Assert.Equal(hash1, hash2);
        }
        private Maybe <UserInfo> GetUser(string login, string pass)
        {
            if (string.IsNullOrWhiteSpace(login))
            {
                Maybe <UserInfo> .NewFailure($"{nameof(login)} is NULL / Empty / Whitespace.");
            }
            if (string.IsNullOrWhiteSpace(pass))
            {
                Maybe <UserInfo> .NewFailure($"{nameof(pass)} is NULL / Empty / Whitespace.");
            }


            var maybeUser = _userInfoService.GetUserInfo(login: login);

            if (maybeUser.Success)
            {
                var user = maybeUser.Value;

                var currentHash   = _saltedHasher.GetHashBytesString(pass, user.PassSalt);
                var userIsTheSame = currentHash.Equals(user.PassHash, StringComparison.OrdinalIgnoreCase);
                if (userIsTheSame)
                {
                    return(maybeUser);
                }
            }

            return(Maybe <UserInfo> .NewFailure("Can't find user by provided credentials."));
        }