requestRefreshToken method Null safety

Future<Token> requestRefreshToken(
  1. String refreshToken
)

Implementation

Future<Token> requestRefreshToken(String refreshToken) async {
  final _tokenRefreshRequest =
      TokenRefreshRequestDetails(config, refreshToken);
  return await _sendTokenRequest(_tokenRefreshRequest.url,
      _tokenRefreshRequest.params, _tokenRefreshRequest.headers);
}