A runner that deletes every single conversation message for a particular account. It should be noted
that if a user appears in a subaccount _at all_ ***every*** single one of their messages will be deleted.
This could cause some unintended side effects.

As such this script should only be run if you're absolutely certain every single message in this account
deleted.

| Question          | Value                                                               |
|:------------------|:--------------------------------------------------------------------|
| For Which account | The account id. e.g. https://*.instructure.com/accounts/:account_id |
