curl --request POST \
  --url https://api.usenexio.com/api/v1/conversation-instances/{instance_slug}/conversations/{conversation_id}/attachments \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form 'end_user=<string>' \
  --form file='@example-file'

import requests

url = "https://api.usenexio.com/api/v1/conversation-instances/{instance_slug}/conversations/{conversation_id}/attachments"

files = { "file": ("example-file", open("example-file", "rb")) }
payload = { "end_user": "<string>" }
headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, data=payload, files=files, headers=headers)

print(response.text)

const form = new FormData();
form.append('end_user', '<string>');
form.append('file', '<string>');

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

options.body = form;

fetch('https://api.usenexio.com/api/v1/conversation-instances/{instance_slug}/conversations/{conversation_id}/attachments', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "attachment": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "filename": "<string>",
    "media_type": "<string>",
    "size_bytes": 123,
    "status": "storing",
    "delivery": "file",
    "created_at": "2023-11-07T05:31:56Z",
    "notice": "<string>",
    "error": "<string>",
    "container_kind": "zip",
    "parent_attachment_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "expires_at": "2023-11-07T05:31:56Z"
  }
}

{
  "code": "attachment_rejected",
  "message": "The file is empty."
}

{
  "code": "unauthorized",
  "message": "Missing or invalid API key"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<unknown>"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<unknown>"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<unknown>"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<unknown>"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<unknown>"
}

{
  "code": "rate_limited",
  "message": "Rate limit exceeded"
}

{
  "code": "<string>",
  "message": "<string>",
  "details": "<unknown>"
}

{
  "code": "attachments_unavailable",
  "message": "File attachments are not available in this environment."
}

{
  "code": "request_timeout",
  "message": "Request timed out"
}