Using External API for NHL - How to Use Data Keys

Attempting to set up a little fun app for my family and friends for the upcoming NHL season. The NHL has a public API for rosters, stats, schedules, etc. Here’s an example:

[https://api-web.nhle.com/v1/roster/CAR/current]

Went through the steps to add a data source, and I get data back. But when I go to add a block with data from that API, the only options for me are the data keys (in this case, “forwards”, “defensemen”, “goalies”) and not the data itself.

Is there something I need to add so that it knows where to look in the endpoint?