Quick question about recovery of the password from Cisco MDS

I got in my hands a Cisco MDS 9148 in production and no admin password. I have no idea of the configuration this thing has inside and I wanted to know if this guide won't break all the config while trying to recover the pass.

https://www.cisco.com/c/en/us/support/docs/storage-networking/mds-9000-series-multilayer-switches/29441-8.html

If anyone can give me a hand I would appreciate it.