How can I get the localePath() from Nuxt 3 server?

// server/api/[...].ts

export default NuxtAuthHandler({
    // The secret is used to encrypt the JWT token
    secret: useRuntimeConfig().auth.secret,

    // Redirects to this page if the user is not authenticated
    pages: {
        // * How to get the locales Path and return?
        signIn: '/zh-TW/auth/',  // '/en-US/auth/'
    },
....

As i18n can only be used in Nuxt3 but not the Nitro. What can I do to redirect a path with the locale path from server to frontend?