How to accept user invite that was created via opc plugin?

hi

I’m running latest chef 12 release and today i setup a second chef organisation. I installed the knife-opc plugin so i could associate an exiting user with the new organisation. With a user that’s an admin i used knife opc org user add second_org username but nothing seems to have happened. When i try to add the same user from chef-server-ctl org-user-add second_org username -VV it says the user had been invited ??

I read somewhere that if i had used the pivotal user with the opc plugin then the invite is automatically accepted… but in my situation i didn’t use pivotal user. So how to i accept the invite, or how does the user see the invite request and accept it ?

I don’t have the web ui installed.

Many thanks