Update docs/source/intro/installation.rst

Co-authored-by: Sebastiaan Huber <[email protected]>

docs/source/intro/installation.rst

@@ -42,9 +42,9 @@ To assume the role of ``postgres`` run as root:
 
 .. tip::
 
-   If you see an error message like ``psql: FATAL:  role "<role_name>" does not exist``, probably you have not created any roles yet.
-   You can run ``psql -l`` to check the existing roles and specify the correct one with the ``-U`` option.
-   If the error message is ``psql: FATAL:  database "<database_name>" does not exist``, you can use the default database ``template1`` with ``psql -d template1`` to connect.
+   If you have installed PostgreSQL through Conda and you see an error like ``psql: FATAL:  role "<role_name>" does not exist`` or ``psql: FATAL:  database "<database_name>" does not exist``, the default role and database apparently do no exist.
+   The command ``psql -l`` prints the list of existing databases and the associated roles.
+   You can try connecting to one of those by using the ``-d`` and ``-U`` option to specify the database and role, respectively, for example, ``psql -d template0 -U some-role``.
 
 Create a new database user account for AiiDA by running: