curl --request GET \
  --url https://connect.cariqa.com/api/v1/users/{user_id}/ \
  --header 'Authorization: Bearer <token>'

{
  "id": "<string>",
  "email": "jsmith@example.com",
  "locale": "en",
  "custom_properties": {
    "external_id": "<string>"
  }
}