> For the complete documentation index, see [llms.txt](https://doc.yeerlo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.yeerlo.com/documentations/yeerlo-api/calling-methods/onboarding-auth/onboard-users.md).

# Onboard Users

{% hint style="warning" %}
**Security Recommendation:** We highly advise integrating a captcha, such as [HCaptcha](https://hCaptcha.com/?r=cd52ac96a013), to verify legitimate signups when using your API key. Please be aware that not implementing this safeguard could result in the deactivation of your API key if we detect any unauthorized signups or abuse through your API key.
{% endhint %}