class ActiveStorage::Blob

def signed_id_verifier # :nodoc:

:nodoc:
to guard against the case where ActiveStorage.verifier isn't yet initialized at load time.
We override the reader (.signed_id_verifier) instead of just calling the writer (.signed_id_verifier=)

Customize the default signed ID verifier for backwards compatibility. 
def signed_id_verifier # :nodoc:
  @signed_id_verifier ||= ActiveStorage.verifier
end