[TOnlineAsyncOpHandle](API\Plugins\OnlineServicesInterface\Online\TOnlineAsyncOpHandle)< [FSendSessionInvite](API\Plugins\OnlineServicesInterface\Online\FSendSessionInvite) > SendSessionInvite ( [FSendSessionInvite::Params](API\Plugins\OnlineServicesInterface\Online\FSendSessionInvite\Params) && Params )