I am trying to use Intellij's file templates (not live templates) to help mitigate how much boilerplate code I use when making Services, daos, and their interfaces.

I am able to use all the system defined variables just fine, such as

${PACKAGE_NAME}

What I want though, is to be able to use my own variable names, like

${MY_USER_INPUT}

however, when i do this like above, I get an error

The documentation says :

It is also possible to specify arbitrary number of custom variables in format ${<VARIABLE_NAME>}.

and then Intellij is supposed to prompt the user for the value.

However, this just plain doesn't work for me. What am I missing?