Function syntax error

CREATE OR REPLACE FUNCTION public.handle_sign_up()
    RETURNS trigger
    LANGUAGE 'plpgsql'
    COST 100
    VOLATILE NOT LEAKPROOF SECURITY DEFINER
AS $BODY$
BEGIN
  if new.raw_user_meta_data->>'user_type' = 'carer' then
    insert into public.carers (user_id, level, status, application_status)
    values (new.id, 0, 0, 'registered');
    return new;
  else if new.raw_user_meta_data->>'user_type' = 'client' then
    insert into public.clients (user_id)
    values (new.id);
    return new;
  else
    RAISE EXCEPTION 'Invalid user type: %', new.raw_user_meta_data->>'user_type';
  end if;
  return null;
END;
$BODY$;