Ok, so you followed the documentation from Odoo.com, here or any other blog & installed Odoo. For some reason, you get an internal server error and logs tell that role Odoo is missing.
Not a problem. In this blog post, I am going to show you how to overcome OperationalError: FATAL: role "odoo" does not exist
This usually happens when installing Odoo from the package and it is related to missing PostgreSQL user.
Quick fix
Simply copy and paste this in your terminal:
1) sudo su postgres
2) createuser odoo -s
3) psql template1
4) \q
5) exit
