...

src/auth.ts

@@ -2,6 +2,7 @@ import { betterAuth } from "better-auth";
 import { prismaAdapter } from "better-auth/adapters/prisma";
 import { nextCookies } from "better-auth/next-js";
 import { prisma } from "./lib/db";
+import { username } from "better-auth/plugins";
 
 export const auth = betterAuth({
     database: prismaAdapter(prisma, {
@@ -16,5 +17,5 @@ export const auth = betterAuth({
             clientSecret: process.env.GITHUB_CLIENT_SECRET as string
         },
     },
-    plugins: [nextCookies()]
+    plugins: [nextCookies(), username()]
 });