Get the saved review-site login (username only, never the password) stored at the company/account level for a given review site.

Auth: Both — authentication. company_id must pass an ownership check, so the company has to sit within the auth user's company hierarchy. Partners can read any company under their tree, an Account user only its own.

Rate limit: No rate limit.

Request

• Query: company_id (integer, required) — must be an existing account and belong to the caller's hierarchy.
• Query: review_site_id (integer, required) — must be an existing review site.

Response — { data. } envelope.

• status (string) — success.
• data (object | empty array) — when credentials exist: id, username, updated_at, review_site_id, review_site_name. When none are saved, data is an empty array []. The password is never returned.

Errors: 422 on validation failure.