fix: do_grp_add_admins

schema/0300_grp.sql

@@ -21,9 +21,9 @@ create function public.do_grp_add_admins()
 declare
   admins int[];
 begin
-  select array_agg(usr.id)
+  admins := ( select array_agg(usr.id)
               from public.grp_members_admins() as usr
-  into admins;
+            );
 
   perform public.grp_add_members( to_grp => NEW.id
                                 , add_usrs => admins

schema/0301_grp_usr.sql

@@ -35,9 +35,9 @@ create function public.grp_members(of_grp int)
   as $$
 begin
   return query select u.*
-               from public.usr u
-               inner join public.grp_usr gu
-                 on gu.usr = u.id and gu.grp = of_grp;
+               from public.grp_usr gu
+               inner join public.usr u on gu.usr = u.id
+               where gu.grp = of_grp;
 end;
 $$;