initChatService method
void
initChatService()
function to set parameters passed from the calling app
Implementation
void initChatService(AtClientManager atClientManagerFromApp, String currentAtSignFromApp, String rootDomainFromApp,
int rootPortFromApp) async {
atClientManager = atClientManagerFromApp;
currentAtSign = currentAtSignFromApp;
rootDomain = rootDomainFromApp;
rootPort = rootPortFromApp;
await startMonitor();
}