Slack has two OAuth2 use cases in the app: the compliance page
integration (chat:write, channels:join, incoming-webhook) and the
access review driver that lists workspace members via users.list
(users:read, users:read.email). The per-caller scope refactor
already handled the compliance page but missed the access review
path, leaving it silently broken (zero scopes → missing_scope from
Slack API).
Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>
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