curl --request POST \
  --url https://api.fanvue.com/v1/creators/{creatorUserUuid}/chats/lists/custom/{uuid}/members \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-Fanvue-API-Version: <x-fanvue-api-version>' \
  --data '
{
  "userUuids": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}
'

import requests

url = "https://api.fanvue.com/v1/creators/{creatorUserUuid}/chats/lists/custom/{uuid}/members"

payload = { "userUuids": ["3c90c3cc-0d44-4b50-8888-8dd25736052a"] }
headers = {
    "X-Fanvue-API-Version": "<x-fanvue-api-version>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'X-Fanvue-API-Version': '<x-fanvue-api-version>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({userUuids: ['3c90c3cc-0d44-4b50-8888-8dd25736052a']})
};

fetch('https://api.fanvue.com/v1/creators/{creatorUserUuid}/chats/lists/custom/{uuid}/members', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "added": 5,
  "skipped": 0
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>"
}

{
  "error": "<string>"
}

{
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>",
  "nextVersion": "<string>"
}

{
  "error": "<string>"
}