Install Better Auth by running the following command Better Auth Docs

pnpm add better-auth

Run the init command to create a new Next.js project or to setup an existing one.

pnpm dlx shadcn@latest init

Add the auth-ui registry in your components.json

{
  "registries": {
    "@auth-cn": "https://auth.uprizing.me/r/{name}.json",
  }
}