Server Auth Not Working

// auth.ts
export const getAuth = query({
    args: {},
    handler: async (ctx) => {
        const userId = await getAuthUserId(ctx)
        const user = await ctx.auth.getUserIdentity()
        console.log('Auth', userId, user) // 'Auth', null, null
        return { userId, user }
    },
})

// auth.config.ts
export default {
    providers: [
        {
            domain: process.env.VITE_CONVEX_SITE_URL,
            applicationID: 'convex',
        },
    ],
}