How to recieve Group room inivation

[LumiProj]

Hi,

I am using ejabberd at backend and using Rest Api I am sending invitation to the user.
I am using "send_direct_invitation" Rest api method of ejabberd but when I call the service I am not able to receive the group invitation request.

Can you please guide me how can I receive the group invitation . I can join the room using JoinRoom method which is working fine.

Thanks