curl --request GET \
  --url https://public-api.lonescale.com/users \
  --header 'x-api-key: <api-key>'

[
  {
    "id": "<string>",
    "firstName": "<string>",
    "lastName": "<string>",
    "email": "<string>",
    "plan": {
      "contactCredits": 123,
      "enrichmentCredits": 123
    }
  }
]