1. login the service computer 

2. psql -ls 

3. find the correct user for your odoo13, you can type below code to try it

 select id, name, active, last_connection_datetime from website_visitor;

4. once you get the correct user, you can input below two line code and you will find that you can log in now.

DELETE FROM website_visitor WHERE active = False;

DELETE FROM public.website_visitor WHERE id = '1';