Add a participant to a chat

curl --request POST \
  --url https://api.relayapp.im/v1/chats/{chatId}/participants \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "handle": "<string>"
}
'

{
  "status": "<string>",
  "trace_id": "<string>",
  "message": "<string>"
}

{
  "error": {
    "status": 123,
    "code": 123,
    "message": "<string>",
    "doc_url": "<string>",
    "retry_after": 123
  },
  "success": true,
  "trace_id": "<string>"
}

{
  "error": {
    "status": 123,
    "code": 123,
    "message": "<string>",
    "doc_url": "<string>",
    "retry_after": 123
  },
  "success": true,
  "trace_id": "<string>"
}

{
  "error": {
    "status": 403,
    "code": 2026,
    "message": "A selected agent or user is blocked.",
    "doc_url": "https://docs.relayapp.im/error/codes/2xxx/2026"
  },
  "success": false
}

{
  "error": {
    "status": 123,
    "code": 123,
    "message": "<string>",
    "doc_url": "<string>",
    "retry_after": 123
  },
  "success": true,
  "trace_id": "<string>"
}

{
  "error": {
    "status": 123,
    "code": 123,
    "message": "<string>",
    "doc_url": "<string>",
    "retry_after": 123
  },
  "success": true,
  "trace_id": "<string>"
}

{
  "error": {
    "status": 123,
    "code": 123,
    "message": "<string>",
    "doc_url": "<string>",
    "retry_after": 123
  },
  "success": true,
  "trace_id": "<string>"
}