refreshToken method

Implementation

@override
Future<AuthResult> refreshToken() async {
  try {
    if (!_initialized) await initialize();

    final account =
        await GoogleSignIn.instance.attemptLightweightAuthentication();

    if (account == null) {
      final error = KAuthError.fromCode(ErrorCodes.tokenExpired);
      return AuthResult.failure(
        provider: AuthProvider.google,
        errorMessage: error.message,
        errorCode: error.code,
        errorHint: '다시 로그인해주세요.',
      );
    }

    return _buildResult(account);
  } catch (e) {
    final error = KAuthError.fromCode(
      ErrorCodes.tokenExpired,
      originalError: e,
    );
    return AuthResult.failure(
      provider: AuthProvider.google,
      errorMessage: kDebugMode ? '구글 토큰 갱신 실패: $e' : '구글 토큰 갱신 실패',
      errorCode: error.code,
      errorHint: error.hint,
    );
  }
}