Get all lead reference sources

curl --request GET \
  --url https://dev.flextell.ai/api/v1/leads/reference-sources \
  --header 'Authorization: Bearer <token>' \
  --header 'X-Tenant: <x-tenant>'

{
  "data": [
    {
      "id": 123,
      "name": "<string>",
      "external_id": "<string>",
      "color": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ],
  "links": {
    "first": "<string>",
    "last": "<string>",
    "prev": "<string>",
    "next": "<string>"
  },
  "meta": {
    "current_page": 2,
    "from": 2,
    "last_page": 2,
    "links": [
      {
        "url": "<string>",
        "label": "<string>",
        "active": true
      }
    ],
    "path": "<string>",
    "per_page": 1,
    "to": 2,
    "total": 1
  }
}