Does not work with SlackBot

[calebbraun]

The script fails because we have a Slackbot auto reply in our channels:
Error:

Traceback (most recent call last):
  File "slack_json_to_csv.py", line 54, in <module>
    user_cur = user[item["user"]]
KeyError: 'USLACKBOT'

Example message in json

{
         "text": "That's just, like, your opinion, man.",
         "type": "message",
         "subtype": "slackbot_response",
         "user": "USLACKBOT",
         "ts": "1510321670.000102"
},

[almccon]

@calebbraun I sort of solved this by editing the users.json file an adding this line to the array of objects:

{"id":"USLACKBOT","name":"Slackbot"},