备份到 github，直接输入可以但 cron 没成功

MAC M1 ，zsh cron 配置的内容为：* * * * * /bin/zsh /Users/macbook/back_up.sh > /Users/macbook/cron_log_ob2.txt 2>&1

cron_log_ob2.txt的内容为：

On branch main
Your branch is up to date with 'origin/main'.

nothing to commit, working tree clean
fatal: could not read Username for 'https://github.com': Device not configured

要执行的脚本的内容为：

cd Documents/obsidian
git add .
git add -A
git commit -a -m "backup from mac m1 using crontab"
git push origin main -f

为什么会显示 fatal: could not read Username for 'https://github.com': Device not configured 呢？如果直接在终端执行 /bin/zsh /Users/macbook/back_up.sh > /Users/macbook/cron_log_ob2.txt 2>&1 那么cron_log_ob2.txt的内容就一切正常，问题出在哪儿？