private string FixUsernameWithDomain()

in src/Unosquare.PassCore.PasswordProvider/PasswordChangeProvider.cs [147:156]

• 7 lines of code
• 5 McCabe index (conditional complexity)

        private string FixUsernameWithDomain(string username)
        {
            if (_idType != IdentityType.UserPrincipalName) return username;

            // Check for default domain: if none given, ensure EFLD can be used as an override.
            var parts = username.Split(new[] { '@' }, StringSplitOptions.RemoveEmptyEntries);
            var domain = parts.Length > 1 ? parts[1] : _options.DefaultDomain;

            return string.IsNullOrWhiteSpace(domain) || parts.Length > 1 ? username : $"{username}@{domain}";
        }