onSessionTokenRequired method Null safety

  1. @required
void onSessionTokenRequired(
  1. dynamic successCb(
    1. String
  2. Function failCb

App needs to fetch a new token. Pass on the new (retrieved) token to SDK via success(NEW_TOKEN) or fail() if fetch failed. In case when app decides not to refresh the session for this user, they should call success(null).


void onSessionTokenRequired(Function(String) successCb, Function failCb) {}