src/app/api/auth/[...nextauth]/route.ts

```typescript
import NextAuth from "next-auth"
import GoogleProvider from "next-auth/providers/google"
import GitHubProvider from "next-auth/providers/github"
import { PrismaAdapter } from "@auth/prisma-adapter"
import { prisma } from "@/lib/prisma"

export const authOptions = {
  adapter: PrismaAdapter(prisma),
  providers: [
    GoogleProvider({
      clientId: process.env.GOOGLE_CLIENT_ID,
      clientSecret: process.env.GOOGLE_CLIENT_SECRET,
    }),
    GitHubProvider({
      clientId: process.env.GITHUB_CLIENT_ID,
      clientSecret: process.env.GITHUB_CLIENT_SECRET,
    }),
  ],
  secret: process.env.NEXTAUTH_SECRET,
}

const handler = NextAuth(authOptions)

export { handler as GET, handler as POST }
```