curl --request POST \
  --url https://sg.sandbox.api.reap.global/users/{id}/application/documents \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --header 'Reap-Version: <reap-version>' \
  --form documentType=IDENTITY \
  --form 'files=<string>'

const form = new FormData();
form.append('documentType', 'IDENTITY');
form.append('files', '<string>');

const options = {
  method: 'POST',
  headers: {'Reap-Version': '<reap-version>', Authorization: 'Bearer <token>'}
};

options.body = form;

fetch('https://sg.sandbox.api.reap.global/users/{id}/application/documents', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://sg.sandbox.api.reap.global/users/{id}/application/documents"

payload = "-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"documentType\"\r\n\r\nIDENTITY\r\n-----011000010111000001101001\r\nContent-Disposition: form-data; name=\"files\"\r\n\r\n<string>\r\n-----011000010111000001101001--"
headers = {
    "Reap-Version": "<reap-version>",
    "Authorization": "Bearer <token>"
}

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

print(response.text)

{
  "status": "NOT_STARTED",
  "nextAction": {
    "type": "PROVIDER_SDK",
    "provider": "SUMSUB",
    "sdkToken": "_act-sbx-abc123-xyz789"
  }
}

{
  "error": {
    "code": "INVALID_APPLICATION_STATUS",
    "message": "<string>",
    "detail": {}
  }
}

{
  "error": {
    "code": "VERIFICATION_METHOD_NOT_ENABLED",
    "message": "<string>",
    "detail": {}
  }
}

{
  "error": {
    "code": "USER_NOT_FOUND",
    "message": "<string>",
    "detail": {}
  }
}