Can't log into imported workspace

K.A.S

I have an Autonomous Database on Oracle Cloud, I imported a workspace from another database, however I can't log into it. No username or password will work. But if I delete the workspace and try to create it manually, I can't because the schema/user still exists.

How do I log into imported workspaces? or, how do I delete a schema? Logging into administration services doesn't allow me to do either.