more detailed document please

[junko2013]

First of all, I would like to thank you for developing such a great plugin, which allows me to develop XMPP applications in Flutter.I like this plug-in very much. I am wondering if it's possible to use certificates for encrypted connections. My IM service uses Openfire.I also have some other questions that I don’t understand. If it's possible, could you please provide a more detailed document? Thank you once again for your great contribution.