text: -- Crea grupo para administradores
  CREATE USER ADMINISTRADOR WITH SUPERUSER CREATEROLE LOGIN;
  
  -- Crea grupo para participantes
  CREATE USER PARTICIPANTE WITH LOGIN PASSWORD 'PASS';
  
  GRANT SELECT, INSERT, UPDATE, DELETE ON public."USUARIO" TO ADMINISTRADOR;
  
  GRANT SELECT, INSERT, UPDATE, DELETE ON public."USUARIO" TO PARTICIPANTE;
  GRANT SELECT ON public."CATEGORIA" TO PARTICIPANTE;
  GRANT SELECT ON public."SUBCATEGORIA" TO PARTICIPANTE;
  GRANT SELECT, INSERT, UPDATE, DELETE ON public."PUJA" TO PARTICIPANTE;