public void IsValid_WithEmptyPassword_ReturnsFalse(string username, string password)
        {
            var credentials = new PackageSourceCredential("source", username, password, isPasswordClearText: false);

            Assert.False(credentials.IsValid());
        }
        public void IsValid_WithNonEmptyValues_ReturnsTrue()
        {
            var credentials = new PackageSourceCredential("source", "user", "password", isPasswordClearText: false);

            Assert.True(credentials.IsValid());
        }