text: create user postgrest with login password 'example';
  create user catarse_fdw with login password 'example';
  create role admin with nologin;
  create role web_user with nologin;
  create role anonymous with nologin;
  grant admin to postgrest;
  grant web_user to postgrest;
  grant anonymous to postgrest;
  
  create extension if not exists postgres_fdw;
  create server catarse_db
      foreign data wrapper postgres_fdw
      options(host 'catarse_db', dbname 'catarse_db', port '5432');
  
  create user mapping for catarse_fdw
      server catarse_db
      options (user 'catarse_fdw', password 'example');
  
  create user mapping for postgres
      server catarse_db
      options (user 'catarse_fdw', password 'example');
  