curl --request POST \
  --url https://api.member.dev/api/v1/contact-auth/me/hubs/{hub_id}/join \
  --header 'Authorization: Bearer <token>'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "ctx": {},
      "input": "<unknown>"
    }
  ]
}