Simplify instruction

Author: NickLarsenNZ

modules/tutorials/pages/authentication_with_openldap.adoc

@@ -45,8 +45,7 @@ Kubernetes cluster.
 Use `stackablectl stacklet list` to find the endpoints of Superset and Trino and open their web interfaces in the
 browser.
 
-You can log into Superset with user _admin_ and password _adminadmin_, and into Trino with user _admin_ and password
-_adminadmin_.
+You can log into both Superset and Trino with user `admin` and password `adminadmin`.
 
 These are the current users defined in Superset's and Trino's internal user management. Later you will see that these users cannot be used for authentication anymore after LDAP authentication has been enabled.