This scope lets an app "View messages and other content in group direct messages that your slack app has been added to"
mpim.history- Fetches history of messages and events from a multiparty direct message.
mpim.replies- Retrieve a thread of messages posted to a direct message conversation from a multiparty direct message.
channel_history_changed- Bulk updates were made to a channel's history
message- A message was sent to a channel
message.mpim- A message was posted in a multiparty direct message channel