validationSharedKeys

An ordered list of shared keys to use for validating signed requests. Shared keys are secret. Ensure that only authorized users can add validation_shared_keys to a keyset. You can rotate keys by appending (pushing) a new key to the list of validation_shared_keys and removing any superseded keys. You must specify public_keys or validation_shared_keys (or both). The keys in public_keys are checked first. Structure is documented below.