Does anyone have any idea on how to implement different things from the Enjin Website into my plugin? If so... Can you kinda lead me in the right direction?
There is full documentation here http://www.enjin.com/api It is just a matter of making some web requests and there are numerous java apis for that. I even found a java implementation here https://github.com/HorusDev/EnjinRequester if you would like to skip writing all of the wrappers yourself.
