token method

@override Future<String> token()

Implementation

@override
Future<String> token() async {
  final access = _access;
  if (access != null && _accessExpiry.difference(DateTime.now()) > const Duration(seconds: 30)) {
    return access;
  }
  final refresh = await _store.read(_refreshKey);
  if (refresh == null) {
    throw StateError('Not signed in — run the PKCE flow and call exchange() first.');
  }
  return _postToken({
    'grant_type': 'refresh_token',
    'refresh_token': refresh,
    'client_id': config.clientId,
  });
}