Can't use auth.uid() inside functions

Hey guys, I can promise you I could used

auth.uid()

auth.uid()

and

auth.email()

auth.email()

auth.email()

auth.email() inside my PostgreSQL functions like over a week ago. That's how I wrote my

delete_user

delete_user

delete_user

delete_user which I use with

.rpc()

.rpc()

.rpc()

.rpc() from code:

begin
raise log 'auth.uid(): %', auth.uid();
delete from auth.users where id = auth.uid();
end;

begin
raise log 'auth.uid(): %', auth.uid();
delete from auth.users where id = auth.uid();
end;

begin
raise log 'auth.uid(): %', auth.uid();
delete from auth.users where id = auth.uid();
end;

begin
raise log 'auth.uid(): %', auth.uid();
delete from auth.users where id = auth.uid();
end;

But now I noticed I can't delete my users anymore and I can see from logs the reason is that

auth.uid()

auth.uid()

returns me

<NULL>

<NULL>

<NULL>

<NULL>. It doesn't matter whether I do

SECURITY DEFINER

SECURITY DEFINER

SECURITY DEFINER

SECURITY DEFINER or

SECURITY INVOKER

SECURITY INVOKER

SECURITY INVOKER

SECURITY INVOKER for my func.

auth.email()

auth.email()

auth.email()

auth.email() doesn't work as well.
Did something happen over this week?