use nextCookies auth plugin

Author: juliusmarminge

apps/nextjs/src/auth/server.ts

@@ -2,6 +2,7 @@ import "server-only";
 
 import { cache } from "react";
 import { headers } from "next/headers";
+import { nextCookies } from "better-auth/next-js";
 
 import { initAuth } from "@acme/auth";
 
@@ -20,6 +21,7 @@ export const auth = initAuth({
   secret: env.AUTH_SECRET,
   discordClientId: env.AUTH_DISCORD_ID,
   discordClientSecret: env.AUTH_DISCORD_SECRET,
+  extraPlugins: [nextCookies()],
 });
 
 export const getSession = cache(async () =>

packages/auth/src/index.ts

@@ -1,18 +1,21 @@
-import type { BetterAuthOptions } from "better-auth";
+import type { BetterAuthOptions, BetterAuthPlugin } from "better-auth";
 import { expo } from "@better-auth/expo";
 import { betterAuth } from "better-auth";
 import { drizzleAdapter } from "better-auth/adapters/drizzle";
 import { oAuthProxy } from "better-auth/plugins";
 
 import { db } from "@acme/db/client";
 
-export function initAuth(options: {
+export function initAuth<
+  TExtraPlugins extends BetterAuthPlugin[] = [],
+>(options: {
   baseUrl: string;
   productionUrl: string;
   secret: string | undefined;
 
   discordClientId: string;
   discordClientSecret: string;
+  extraPlugins?: TExtraPlugins;
 }) {
   const config = {
     database: drizzleAdapter(db, {
@@ -25,6 +28,7 @@ export function initAuth(options: {
         productionURL: options.productionUrl,
       }),
       expo(),
+      ...(options.extraPlugins ?? []),
     ],
     socialProviders: {
       discord: {