Hi ,
Is the password for "security" account ?
We can reset the password in below ways.
1) If they have any other accounts they can reset the password.
2) If you have access to HCP Node CLI, you can reset the password. Else you need to ask Customer Support to run the below commands.
admin jvm useraccount update <cluster - parentUUID> <userId> --username <xxxxx> --password <xxxxx>
3) If you have access to HCP Node CLI, you can create another account and give it to customer for resetting their password.
admin jvm useraccount add <cluster - parentUUID> <userId> --username <xxxxx> --password <xxxxx>