List all campaigns

curl --request GET \
  --url https://campaignservice-staging.withbenji.com/campaigns \
  --header 'Authorization: Bearer <token>'

{
  "campaigns": [
    {
      "id": 1,
      "name": "<string>",
      "description": "<string>",
      "campaign_logo": "<string>",
      "campaign_type": 1,
      "trigger_type": 1,
      "custom_trigger_id": 123,
      "partner_id": 1,
      "merchant_id": 1,
      "partnership_id": 1,
      "is_active": 0,
      "start_date": "2023-11-07T05:31:56Z",
      "end_date": "2023-11-07T05:31:56Z",
      "owner_id": 1,
      "is_template": 0,
      "template_id": 123,
      "total_rewards": 1,
      "actions": [
        {
          "id": null,
          "action_type": 1,
          "partner_id": 2,
          "base_reward": 1
        }
      ],
      "conditions": [
        {
          "id": null,
          "partner_id": 2,
          "campaign_condition_type": 1,
          "condition_value": 1,
          "condition_operator": 1,
          "or_and_operator": 1,
          "condition_attribute": 123
        }
      ],
      "multipliers": [
        {
          "id": null,
          "partner_id": 123,
          "multiplier_attribute_type": 1,
          "multiplier_amount": 1,
          "multiplier_attribute": 2
        }
      ],
      "goals": [
        {
          "id": null,
          "partner_id": 2,
          "goal_type": 1,
          "goal_value": null,
          "goal_operator": 1
        }
      ]
    }
  ]
}