In TestFlight what is minimum role needed to install app?

Hey all, trying out TestFlight for the first time to test a new app, and it looked like I had to assign the role of Marketer to someone in order to let them download the app. I am not sure about this - would assiging them as sales or customer support have worked also?

The reason I ask is that when I initially had added a tester as a Marketer, I was able to see their device under Tester Profile in iTunes Connect.

Now after I changed their role to customer support, I dont see that info.

In TestFlight what is minimum role needed to install app?
 
 
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