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Link an additional owner to a single credential

POST 
/openapi/v1/credentials/:credentialId/link

Add an owner reference to one credential addressed by ID in the path. The credential entity is unchanged — we just register a new relationship. Idempotent: linking to the same owner twice is a no-op. Linking when that owner-type slot already holds a different ID returns 409 — use {@code POST /credentials/{id}/transfer} to replace. The body's {@code from} and {@code credentialIds} fields are ignored on this single-credential variant; use {@code POST /credentials/link} for the bulk shape.

Request​

Responses​

OK