auth.ts: ```export const auth = betterAuth({ database: pgPool, user: { additionalFields: { firstName: { type: "string", required: false, }, lastName: { type: "string", required: false, }, },... ``` auth-client.ts: ```export const authClient = createAuthClient({ baseURL: "http://localhost:3000", plugins: [inferAdditionalFields<typeof auth>(), anonymousClient()], });``` Trying to build my app but consistently getting this error: ```Type error: Property 'isAnonymous' does not exist on type '{ agencies: {} | null; id: string; name: string; emailVerified: boolean; email: string; createdAt: Date; updatedAt: Date; image?: string | null | undefined; }'. 17 | }); 18 | > 19 | const isAuthenticatedUser = session?.user && !session.user.isAnonymous;```