sqlplus
User: / as sysdba
Password like main but capital letter on 2nd to last letter.
These might work (originally from another installation):
* Multitenant Container DB: localhost:1521
* Pluggable DB: localhost:1521/XEPDB1
* EM ExpressURL: https://localhost:5500/em
alter session set "_ORACLE_SCRIPT"=true;
create user dwheele identified by password;
grant DBA to dwheele;
create user dcadmin identified by dcadmin;