def METHOD_NAME(name, backend_cls):
    """Create the backend instance and add it to the registry.
    Args:
        name (str): Name of the backend.
        backend_cls (class): Backend class to instantiate. Class must implement a constructor without parameters.
    Raises:
        Exception: If the backend has already been registered.
    """
    if name.lower() in backend_map:
        raise Exception(f'Backend {name} already registered')
    backend_map[name.lower()] = backend_cls()