Hi Vasu,
Apart from what has been suggested, in case you need to access the user in case of emergency, you can as well extract the password using the password extraction utility that is shipped along with the product.
Having the same password for the same account across the environment, I would consider this is a security threat rather than an feature. This would expose all your servers simultaneously at the same time to the user of this account.
Do let us know if you have any further queries regarding this.
Thanks and Regards,
Reatesh.