use std::convert::TryInto; /// Run like this `echo url=https://example.com | cargo run --example git-credential-light -- fill`pub fn main() -> Result<(), git_credentials::program::main::Error> {    git_credentials::program::main(        std::env::args_os().skip(1),        std::io::stdin(),        std::io::stdout(),        |action, context| {            use git_credentials::program::main::Action::*;            git_credentials::program::Cascade::default()                .invoke(match action {                    Get => git_credentials::helper::Action::Get(context),                    Erase | Store => todo!(),                })                .map(|outcome| outcome.and_then(|outcome| (&outcome.next).try_into().ok()))        },    )}