Equivalent Linux commands for Windows ones to create user and database
On a 32-bit openSUSE Tumbleweed with PostgreSQL 13 installed. Just run:
&gt; sudo su postgres
&gt; createuser --username=postgres --superuser --pwprompt saleor
&gt; createdb --username=postgres --owner=saleor saleor

If the user already exists, it can be deleted by:
&gt; sudo su postgres
&gt; dropuser --username=postgres saleor

To see a list of users and databases, just run:
&gt; sudo su postgres
&gt; psql
# \du
# \l
# \q