code: public static Map<String, String> list(final String credsStore) throws IOException {
      return credentialHelperDelegate.list(credsStore);
    }
docs: Lists credentials stored in the credsStore.
  @param credsStore Name of the docker credential helper
  @return Map of registries to auth identifiers.
  (For instance, usernames for which you have signed in.)
  @throws IOException When we cannot read from the credential helper