Can someone point me in the right direction regarding creating users in quickstart? For some reason, I am unable to create users, and can't find any info in the documentation....

Are you referring to letting more users login to datahub using logins other than the default "datahub", or adding users in datahub so that u can search for users and attach them to entities?

You will need to change a file. This might be a relevant discussion https://datahubspace.slack.com/archives/CV2UVAPPG/p1636450948110500?thread_ts=1636450148.109600&cid=CV2UVAPPG