This scope lets an app "View the user's profile picture"
This scope works with workspace apps implementing Sign in with Slack.
You may ask for this scope at the same time as other identity*:read:user scopes; however, you can't ask for it along with other non-identity-related scopes, like users:read or reminders:write:user.
This OAuth permission scope works with these Web API methods.
users.identity - Get a user's identity.