Unfortunately the only viable option, since you did not create additional users OR configure your SMTP (email) settings in the CSPC in order to receive a one-time password, is to re-deploy. For future purposes it is always best practice to have more than one user created, whether local or remote, and have your email configuration saved.
If you do have CLI access you can at least leverage the Collection Profile data, which can help expedite the CSPC re-deployment process. Login to the CSPC as 'collectorlogin' user -> switch user to 'root' -> cd to $CSPCHOME/exportdata. You can scp your latest inventory data, unzip and leverage for rebuilding the new CSPC instance.