Obfuscate key only

[MvdO79]

Is it possible with below route to obfuscate the [key] only? Right now the [screenname] part is also getting obfuscated when it holds numbers like: "Cootje58".

.get(name="profile", pattern="user/[screenname]/[key]", to="users##profile", constraints = { key = "\w+\d+" })

[MvdO79]

Just constructed a custom url without using urlFor, if this can be handled in another way let me know.