Forti Analyzer credentials

How can we recover lost admin username and password of Forti Analyzer?(Not having Old backup config)

I have referred a KB 

https://community.fortinet.com/t5/FortiAnalyzer/Troubleshooting-Tip-Restoring-FortiManager-or-FortiAnalyzer/ta-p/193264?cmd=displayKC&docType=kc&externalId=FD40431

As per the above KB, need to reset the configuration as we do not have configuration backup.

Any other suggestion for this