Which value of plan_bundle should I get, If I want to get the number of hosts in a Zoom meeting account plan?

I ran the “Get plan usage” API to get the number of hosts in my Zoom conference account plan. However, the value I was able to get was plan_bundle, and I could not figure out which key to get correctly.
I thought plan_bundle.bundled_plans.hosts might be it, but I couldn’t figure it out because the API documentation didn’t give any details.
Could you please help me?

The API endpoint where this problem occurred is “https://api.zoom.us/v2/accounts/{accountId}/plans/usage” in GET.