cancel method

Implementation

void cancel() {
  _pendingCaptureRequest = false;

  String errorMessage = 'Cancelled by user';
  if (_context != null) {
    errorMessage = InfoStrings(_context!).decline;
  }

  state = state.copyWith(
    state: LivenessState.error,
    sessionState: LivenessSessionState.error,
    errorMessage: errorMessage,
    session: null,
  );
}