List workspace members

curl --request GET \
  --url https://api.attio.com/v2/workspace_members \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": {
        "workspace_id": "14beef7a-99f7-4534-a87e-70b564330a4c",
        "workspace_member_id": "50cf242c-7fa3-4cad-87d0-75b1af71c57b"
      },
      "first_name": "Susan",
      "last_name": "Kare",
      "avatar_url": "https://lh3.googleusercontent.com/a/ABdFTp7z6OgAW9EqZx78wTqPfWClGCJCZXFjQfBG7rd9=s96-c",
      "email_address": "susan.kare@apple.com",
      "created_at": "2022-11-21T13:22:49.061281000Z",
      "access_level": "member"
    }
  ]
}