curl --request GET \
  --url https://api.hubapi.com/settings/v3/users/ \
  --header 'Authorization: Bearer <token>'

{
  "results": [
    {
      "email": "<string>",
      "id": "<string>",
      "roleIds": [
        "<string>"
      ],
      "superAdmin": true,
      "firstName": "<string>",
      "lastName": "<string>",
      "primaryTeamId": "<string>",
      "roleId": "<string>",
      "secondaryTeamIds": [
        "<string>"
      ],
      "sendWelcomeEmail": true
    }
  ],
  "paging": {}
}