Hi, I need some help with how to set a challenge, please. I want to set a challenge for a group of employees to work towards "amount of badges earned". 

For example, I would like to have the group to have an aim of 50 badges awarded to them as a total. When they reach this then that would be the challenge complete.

However, I am lost as to how to get the system to measure the number of badges awarded in the challenge. 

For the goal definition I have:

• Model: Gamification badge

• Date Field: Date Created on (gamification.badge)

I would like help on what to do next please? The documentation is a little confusing with regards to how best to set up gamification.