How to find a password that was purposely recorded in Event Logs with PowerShell?

Question

I have a very specific question. I'm in the middle of an assignment for school and my team is stuck at a part where we need to recover a password from the Event Logs that was purposely placed in there. He said there should be logs that have the password included in them that were man-made but we have no idea where to look. We've looked through the 4688, 4723, 4724 event logs, as well as the rest of them even though they don't apply much to this situation, to see if maybe there is custom information that's placed that includes a password but we can't find anything. There are logs where we can see that users were made and changes were made to their accounts/passwords and then one user was disabled and deleted but is there a way to actually get more information from an event log using PowerShell? We've been using MyEventViewer for the event logs but are really lost at this point. Our teacher said that he was able to get the password by using PowerShell. Does anyone have any idea as to how we could go about getting the password for a user like that going through PowerShell? It's the Domain Admin accounts password that we're looking for and it's also the same password for a KeePass database file that we need to unlock and then perform a live response after. Even if anyone knew how you can input your password into an event log, that would also really help so we can backtrack to see about exporting it. Any information would be greatly appreciated, thanks!