For GCP alert Notification Channels for Slack (<https://www.pulumi.com/registry/packages/gcp/api-doc...
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For GCP alert Notification Channels for Slack (https://www.pulumi.com/registry/packages/gcp/api-docs/monitoring/notificationchannel/) does anyone know how the slack refresh token can be used? I see the sensitive label for auth token, but not refresh token.