Can I use variable in windows service deployment?

I can use octopus deployment to deploy a windows service, is it possible to change the custom account name (the windows service running under) to a variable?

Say I define variable ServiceUserName. On development environment the value is Jerry and on production the value is Peter. Can I set the Custom account name to “ServiceUserName”, so it will be changed automatically?

worked out this myself.

Just need to use variable like #{WindowsUserPassword}, it will work.