curl --request GET \
  --url https://api.joinslash.com/slash-handle \
  --header 'X-API-Key: <api-key>'

{
  "items": [
    {
      "id": "<string>",
      "slashHandle": "<string>",
      "name": "<string>",
      "accountId": "<string>"
    }
  ],
  "metadata": {
    "nextCursor": "<string>",
    "count": 123
  }
}