Ember - GET Request to nested API Endpoint

I'm trying to find a list of all individuals in a particular group (let's say group 349) with a GET /groups/349/individuals request to the API (I'm using the JSONAPIAdapter). I'm assuming I would need to find the specific group first and then find the list of all individuals in that group second.

I originally thought to use something like:

this.store.findRecord('group', 349).then(function(members) {
    ...
})

But I'm not sure what to put inside the function. I'm also not sure if this is the correct approach or if I would need to do a this.store.findAll('individual') after finding the specific group I was searching for. I have looked throught the Ember documentation but have not found anything specific for my particular case.

If anyone could point me in the right direction it would be greatly appreciated.