Create Stripe Connected Account
Create a Stripe Express connected account for the authenticated user. Idempotent — returns existing account if already connected.
Auth required: Yes
200: Existing account returned201: New account created401: Authentication required or invalidRequires authentication. Pass a Bearer token (Supabase JWT) or an API key (`Authorization: Bearer vennio_sk_live_*`) in the request headers.
Base URL: https://api.vennio.app