def register_auth_backend(backend_cls):
 warn(u'reviewboard.accounts.backends.register_auth_backend() is deprecated. Use reviewboard.accounts.backends.auth_backends.register() instead.', DeprecationWarning)
 auth_backends.register(backend_cls)

def register_auth_backend ( backend_cls ) : warn ( u'reviewboard.accounts.backends.register_auth_backend() is deprecated. Use reviewboard.accounts.backends.auth_backends.register() instead.' , DeprecationWarning ) auth_backends . register ( backend_cls )
register an authentication backend .