Retrieve an authorization

Retrieves the current state of an authorization. The authorization detail response is the primary read model. Inspect `status` and `nextAction` to decide what to do next, `requirements` for unresolved blockers, `submission.reviewSnapshot` for final approval, and `submission.payerReceipt`, `submission.decision`, and `outcome` for terminal truth. Use the returned `version` as the value for `If-Match` on every mutable authorization request. ## Returns Returns the authorization. Returns `404 prior_authorization_not_found` if the authorization is unknown to the authenticated organization.