Reply.py

headers = {
  "Rest-Impersonate-User": userid,
  "Rest-User-Token": "XXXXXXXXXXXXXXXXXXXXXXX",
}
try:
  json = {
     'ThreadId': thread_id,
     'ForumId': 21,
     'Body': data['raw'],
     'PostDate': data['created_at'].strftime("%Y-%m-%d %H:%M:%S")
  }
  post(f"{base_url}/api.ashx/v2/forums/21/threads/{thread_id}/replies.json", json=json, headers=headers) as resp:
      if resp.status != 200:
          print('post status', resp.text)
      else:
          print('success')
          return resp

Topic.py

headers = {
  "Rest-Impersonate-User": userid,
  "Rest-User-Token": "XXXXXXXXXXXXXXXXXXXXXXX",
}
try:
  json = {
     'ForumId': 21,
     'Subject': data['title'],
     'Body': data['raw'],
     'PostDate': data['created_at'].strftime("%Y-%m-%d %H:%M:%S")
  }
  post(f"{base_url}/api.ashx/v2/forums/21/threads.json", json=json, headers=headers) as resp:
      if resp.status != 200:
          print('post status', resp.text)
      else:
          print('success')
          return resp