Customizing UMC user notifications with user information in it

Hello experts,

Does anybody know how do we add user information like user name and password in the html template, while customizing the user notifications in UMC?

for e.g. User Creation notification

The default notification email message body contains the user name and password in it. However if we confgure the message body with our custom message, it completely replaces the default message.

I need UMC to send out our custom email message with user details in it.

Regards,

Amol Patil