curl --request GET \
  --url https://api.atendai.com/api/campaigns

{
  "campaigns": [
    {
      "id": "<string>",
      "name": "<string>",
      "groupMembersLimit": 123,
      "releaseDate": "2023-11-07T05:31:56Z",
      "acceptEntriesUntil": "2023-11-07T05:31:56Z",
      "isActive": true,
      "companyId": "<string>",
      "whatsappId": "<string>",
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "groups": [
        {
          "id": "<string>",
          "jid": "<string>",
          "name": "<string>",
          "membersCount": 123,
          "order": 123,
          "campaignId": "<string>",
          "companyId": "<string>",
          "status": "<string>",
          "createdAt": "<string>",
          "updatedAt": "<string>",
          "description": "<string>",
          "picture": "<string>",
          "inviteLink": "<string>",
          "initialMembers": {},
          "settings": {},
          "logs": {}
        }
      ]
    }
  ]
}