curl --request GET \
  --url https://realtime-api.voiceflow.com/v1/stable/function \
  --header 'Authorization: Bearer <token>'

{
  "functions": [
    {
      "id": "<string>",
      "name": "<string>",
      "code": "<string>",
      "image": "<string>",
      "settings": {
        "timeoutMs": 300000
      },
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "pathOrder": [
        "<string>"
      ],
      "description": "<string>"
    }
  ]
}