who can use instant token?
I am interested in using box instant tokens. The documentation says it is in "private beta". What does private beta mean and who can participate in private beta?

Also, what do I need to do enable my app to make /tokens endpoint call.
who can use instant token?
===

I am interested in using box instant tokens. The documentation says it is in "private beta". What does private beta mean and who can participate in private beta?

Also, what do I need to do enable my app to make /tokens endpoint call.