failed to authenticate SSH session

[harilet]

I am trying to push to a github repo using the ssh remote but I am getting an error failed to authenticate SSH session: ; class=Ssh (23)

the code

fn push(repo_location: &str, origin: &str) {
    let repo = Repository::open(repo_location).unwrap();
    let mut origin = repo.find_remote(&origin).unwrap();

    let branch = repo.find_branch(&"main", BranchType::Local).unwrap();

    let branch_ref = branch.into_reference();
    let branch_ref_name = branch_ref.name().unwrap();
    repo.set_head(branch_ref_name).unwrap();

    let mut remote_callbacks = git2::RemoteCallbacks::new();
    remote_callbacks.credentials(|_url, _username_from_url, _allowed_types| {
        match git2::Cred::ssh_key(
            _username_from_url.unwrap(),
            // Some(std::path::Path::new("<home>/.ssh/github/id_rsa.pub")),
            None,
            std::path::Path::new("<home>/.ssh/github/id_rsa"),
            None,
        ) {
            Ok(cred) => {
                println!("credential creation success");
                Ok(cred)
            }
            Err(e) => {
                println!("credential creation Failed: {:#?}", e);
                Err(e)
            }
        }
    });

    let mut push_options = git2::PushOptions::new();
    let mut_push_options = push_options.remote_callbacks(remote_callbacks);

    match origin.push(&[branch_ref_name], Some(mut_push_options)) {
        Ok(_) => {
            println!("push-pushed to remote")
        }
        Err(e) => {
            println!("push-failed to push to remote: {}", e)
        }
    };
}

and I am getting this output

and I am able to read the key file

can anyone help?