unable to use to push commits

[Lunarequest]

I tried to use this for the callbacks for pushing commits,

use anyhow::{Context, Result};
use git2::{Config, PushOptions, RemoteCallbacks, Repository};
use git2_credentials::CredentialHandler;

pub fn git_push(repo: &Repository) -> Result<()> {
    let head = repo.head()?.resolve()?;
    let config = Config::open_default().context("failed to open gitconfig")?;
    let mut cred_handler = CredentialHandler::new(config);
    let mut callbacks = RemoteCallbacks::new();

    callbacks.credentials(move |url, username, allowed_types| {
        cred_handler.try_next_credential(url, username, allowed_types)
    });
    let mut remote = repo
        .find_remote("origin")
        .map_err(|_| git2::Error::from_str("failed to resolve remote origin"))?;

    let mut push_options = PushOptions::new();

    remote.push(
        &[&format!("refs/heads/{}", head.shorthand().unwrap())],
        Some(&mut push_options),
    )?;
    Ok(())
}

this should be simple enough to to push any commits that are present in the working tree in the current branch. However when ever you try and run this you get a authentication error as such Error: authentication required but no callback set; class=Ssh (23); code=Auth (-16) I'm quite perplexed since this should work just fine. If I've made a silly mistake please point me in the right direction

[davidB]

How did you solve the issue?

[Lunarequest]

i missed adding the handler to the push_options