This scope lets an app "Access content in your public channels"
channels.history- Fetches history of messages and events from a channel.
channels.replies- Retrieve a thread of messages posted to a channel
conversations.history- Fetches a conversation's history of messages and events.
conversations.replies- Retrieve a thread of messages posted to a conversation
channel_history_changed- Bulk updates were made to a channel's history
message- A message was sent to a channel
message.channels- A message was posted to a channel