if you rename the quickstart.jar to aem-65-p4503, the runmode "publish" is not deduced from the name of the jar, but only the port, so technically you have an author running on port 4503. But anyway, the default passwords still should work. You can either try to analyze the issue or you can just start over.
@narin_209202 It asks for the admin password while setting up the instance. In case you're not sure what the password was set to, you can try resetting it with oak-run command as mentioned in this link: