use std::convert::TryInto; /// Invokes `git credential` with the passed url as argument and prints obtained credentials.pub fn main() -> Result<(), Box<dyn std::error::Error>> {    let out = git_credentials::builtin(git_credentials::helper::Action::get_for_url(        std::env::args()            .nth(1)            .ok_or("First argument must be the URL to obtain credentials for")?,    ))?    .ok_or("Did not obtain credentials")?;    let ctx: git_credentials::protocol::Context = (&out.next).try_into()?;    ctx.write_to(std::io::stdout())?;    Ok(())}