# Auth Form

> A presentation-only sign-in / sign-up form that progressively reveals the password field, animates between modes, and morphs its submit button through submitting/success/error states.

- Author: [Edu Calvo](https://21st.dev/@educalvolpz)
- Library: [SmoothUI](https://21st.dev/@educalvolpz/library/smoothui)
- License: MIT
- Tags: Authentication, Sign in, Sign Up, Login, Form
- npm dependencies: motion, lucide-react
- Live preview: https://21st.dev/@educalvolpz/components/auth-form

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/educalvolpz/auth-form?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/authentication.md