Get Campaign Leads

curl --request GET \
  --url https://api.puretalk.ai/api/campaigns/{campaign_id}/leads \
  --header 'X-API-KEY: <api-key>'

{
  "count": 123,
  "next": "<string>",
  "previous": "<string>",
  "results": [
    {
      "to_number": "<string>",
      "is_completed": true,
      "variables": [
        {
          "var_name": "<string>",
          "var_value": "<string>"
        }
      ],
      "call_id": "<string>",
      "completed_at": "2023-11-07T05:31:56Z"
    }
  ]
}