Retrieve all Penbox workspaces that the authenticated user has authorized your application to access.
slug is a URL-safe, unique identifier for the workspace. It’s used in API calls to specify which workspace you want to interact with.
Slug format:
acme-corpmy-company-123law-firm-llpAPI token (starts with pnbx_). Create at https://app.penbox.io/workspace/settings/api. Include as: Authorization: Bearer {token}