How add/buy users acces to 3DEXPERIENCE Engineer Student platform?

Hello fellows,

I am about to lead a student on his bachelor tesis, and I would like to manage it on 3DExperience, I have asked to my educational VAR, but I am afraid they are in summer holidays. So, in order to save some time, I think that I could buy the licenses for him in order to work on it now. So, how can buy other licens linked to mine?

I have "3DEXPERIENCE Engineer Student"

Thanks.
Edu  3DEXPERIENCE ENGINEER