const options = {
  method: 'GET',
  headers: {'x-spree-api-key': '<api-key>', Authorization: 'Bearer <token>'}
};

fetch('http://{defaultHost}/api/v3/store/companies/{company_id}/members', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request GET \
  --url http://{defaultHost}/api/v3/store/companies/{company_id}/members \
  --header 'Authorization: Bearer <token>' \
  --header 'x-spree-api-key: <api-key>'

{
  "data": [
    {
      "id": "cmem_UkLWZg9DAJ",
      "company_id": "comp_UkLWZg9DAJ",
      "customer_id": "cust_UkLWZg9DAJ",
      "email": "su_kuvalis@ward.biz"
    }
  ],
  "meta": {
    "page": 1,
    "limit": 25,
    "count": 1,
    "pages": 1,
    "from": 1,
    "to": 1,
    "in": 1,
    "previous": null,
    "next": null
  }
}