Choice model for app.context or Choice plugin

Something similar to the prompt plugin, but being an enum/array vs string, this could be very useful in many situations.

My use case is I have a REST API, I have a rout to create token, it takes an enum of 'rest' or 'validate' for the token type. Instead of adding a new request or manually inputting 'rest' or 'validate', it would be nice to have a prompt to select one of them.