curl --request GET \
  --url https://api.copper.co/platform/organizations/{organizationId}/members

{
  "members": [
    {
      "isActive": true,
      "organizationId": "<string>",
      "userId": "<string>",
      "_embedded": {
        "permissionGroups": [
          "<string>"
        ],
        "user": {
          "userId": "<string>",
          "createdAt": "<string>",
          "firstName": "<string>",
          "lastName": "<string>"
        }
      },
      "createdAt": "<string>",
      "deactivatedAt": "<string>",
      "updatedAt": "<string>"
    }
  ]
}