curl --request POST \
  --url https://app.chatobserver.com/api/v2/metrics/client-auth/challenges \
  --header 'Content-Type: application/json' \
  --data '
{
  "documentReferenceHash": "<string>",
  "hostUserReferenceHash": "<string>",
  "codeChallenge": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    documentReferenceHash: '<string>',
    hostUserReferenceHash: '<string>',
    codeChallenge: '<string>'
  })
};

fetch('https://app.chatobserver.com/api/v2/metrics/client-auth/challenges', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.chatobserver.com/api/v2/metrics/client-auth/challenges"

payload = {
    "documentReferenceHash": "<string>",
    "hostUserReferenceHash": "<string>",
    "codeChallenge": "<string>"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

{
  "data": {
    "challengeId": "<string>",
    "pollSecret": "<string>",
    "userCode": "<string>",
    "authorizationUrl": "<string>",
    "pollIntervalSeconds": 123,
    "expiresAt": "<string>"
  }
}

{
  "error": {
    "code": "internal",
    "fieldPath": [
      "<string>"
    ],
    "parameters": {},
    "repairActions": [
      "<string>"
    ],
    "requestId": "<string>",
    "retryable": false,
    "retryAfterSeconds": 1
  }
}