use git_credentials::helper; /// Run like this `echo url=https://example.com | cargo run --example custom-helper -- get`pub fn main() -> Result<(), git_credentials::helper::main::Error> {    git_credentials::helper::main(        std::env::args_os().skip(1),        std::io::stdin(),        std::io::stdout(),        |action, credentials| -> std::io::Result<_> {            match action {                helper::main::Action::Get => Ok(Some(helper::Context {                    username: Some("user".into()),                    password: Some("pass".into()),                    ..credentials                })),                helper::main::Action::Erase => Err(std::io::Error::new(                    std::io::ErrorKind::Other,                    "Refusing to delete credentials for demo purposes",                )),                helper::main::Action::Store => Ok(None),            }        },    )}