how to unlock is clear what is not clear is what is needed to get it unlocked to change, is it the token, api key, wallet identifier or the otpauth://totp/ blank ?
This doesn't seem to be from any wallet that I'm familiar with, and the Technical Support forum is intended to be used for Bitcoin Core. You'll get better support by posting in the section specific to the wallet you're using, but no one will be able to provide any significant help without that knowledge.