How to Migrate from Supabase Auth Helpers to SSR package

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npm uninstall @supabase/auth-helpers-nextjs @supabase/supabase-js
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npm install @supabase/ssr @supabase/supabase-js

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// lib/supabase/client.ts
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import { createBrowserClient } from '@supabase/ssr';
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export function createClient() {
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  return createBrowserClient(
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    process.env.NEXT_PUBLIC_SUPABASE_URL!,
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    process.env.NEXT_PUBLIC_SUPABASE_PUBLISHABLE_KEY!
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  );
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}
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// lib/supabase/server.ts
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import { createServerClient } from '@supabase/ssr'
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import { cookies } from 'next/headers'
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export async function createClient() {
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  const cookieStore = await cookies()
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  return createServerClient(
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    process.env.NEXT_PUBLIC_SUPABASE_URL!,
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    process.env.NEXT_PUBLIC_SUPABASE_PUBLISHABLE_KEY!,
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    {
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      cookies: {
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        getAll() {
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          return cookieStore.getAll()
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        },
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        setAll(cookiesToSet) {
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          try {
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            cookiesToSet.forEach(({ name, value, options }) => cookieStore.set(name, value, options))
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          } catch {
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            // The `setAll` method was called from a Server Component.
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            // This can be ignored if you have middleware refreshing
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            // user sessions.
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          }
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        },
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      },
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    }
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  )
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}
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// lib/supabase/proxy.ts
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import { createServerClient } from '@supabase/ssr'
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import { NextResponse, type NextRequest } from 'next/server'
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export async function updateSession(request: NextRequest) {
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  let supabaseResponse = NextResponse.next({
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    request,
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  })
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  // With Fluid compute, don't put this client in a global environment
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  // variable. Always create a new one on each request.
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  const supabase = createServerClient(
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    process.env.NEXT_PUBLIC_SUPABASE_URL!,
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    process.env.NEXT_PUBLIC_SUPABASE_PUBLISHABLE_KEY!,
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    {
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      cookies: {
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        getAll() {
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          return request.cookies.getAll()
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        },
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        setAll(cookiesToSet) {
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          cookiesToSet.forEach(({ name, value }) => request.cookies.set(name, value))
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          supabaseResponse = NextResponse.next({
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            request,
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          })
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          cookiesToSet.forEach(({ name, value, options }) => supabaseResponse.cookies.set(name, value, options))
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        },
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      },
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    }
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  )
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  // Do not run code between createServerClient and
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  // supabase.auth.getClaims(). A simple mistake could make it very hard to debug
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  // issues with users being randomly logged out.
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  // IMPORTANT: If you remove getClaims() and you use server-side rendering
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  // with the Supabase client, your users may be randomly logged out.
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  const { data } = await supabase.auth.getClaims()
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  const user = data?.claims
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  if (
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    !user &&
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    !request.nextUrl.pathname.startsWith('/login') &&
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    !request.nextUrl.pathname.startsWith('/auth')
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  ) {
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    // no user, potentially respond by redirecting the user to the login page
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    const url = request.nextUrl.clone()
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    url.pathname = '/login'
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    return NextResponse.redirect(url)
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  }
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  // IMPORTANT: You *must* return the supabaseResponse object as it is. If you're
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  // creating a new response object with NextResponse.next() make sure to:
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  // 1. Pass the request in it, like so:
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  //    const myNewResponse = NextResponse.next({ request })
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  // 2. Copy over the cookies, like so:
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  //    myNewResponse.cookies.setAll(supabaseResponse.cookies.getAll())
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  // 3. Change the myNewResponse object to fit your needs, but avoid changing
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  //    the cookies!
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  // 4. Finally:
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  //    return myNewResponse
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  // If this is not done, you may be causing the browser and server to go out
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  // of sync and terminate the user's session prematurely!
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  return supabaseResponse
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}

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// proxy.ts
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import { type NextRequest } from "next/server"
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import { updateSession } from "@/lib/supabase/proxy"
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export async function proxy(request: NextRequest) {
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  return await updateSession(request)
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}
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export const config = {
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  matcher: [
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    /*
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     * Match all request paths except for the ones starting with:
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     * - _next/static (static files)
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     * - _next/image (image optimization files)
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     * - favicon.ico (favicon file)
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     * Feel free to modify this pattern to include more paths.
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     */
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    "/((?!_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)",
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  ],
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}

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// app/login/actions.ts
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'use server';
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import { revalidatePath } from 'next/cache';
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import { redirect } from 'next/navigation';
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import { createClient } from '@/utils/supabase/server';
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export async function login(formData: FormData) {
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  const supabase = createClient();
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  // type-casting here for convenience
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  // in practice, you should validate your inputs
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  const data = {
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    email: formData.get('email') as string,
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    password: formData.get('password') as string,
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  };
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  const { error } = await supabase.auth.signInWithPassword(data)
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  if (error) {
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    redirect('/error');
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  }
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  revalidatePath('/', 'layout');
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  redirect('/');
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}
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export async function signup(formData: FormData) {
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  const supabase = createClient();
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  // type-casting here for convenience
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  // in practice, you should validate your inputs
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  const data = {
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    email: formData.get('email') as string,
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    password: formData.get('password') as string,
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  };
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  const { error } = await supabase.auth.signUp(data);
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  if (error) {
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    redirect('/error');
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  }
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  revalidatePath('/', 'layout');
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  redirect('/');
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}

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// app/login/page.tsx
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import { login, signup } from './actions';
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export default function LoginPage() {
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  return (
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    <form>
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      <label htmlFor="email">Email:</label>
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      <input id="email" name="email" type="email" required />
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      <label htmlFor="password">Password:</label>
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      <input id="password" name="password" type="password" required />
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      <button formAction={login}>Log in</button>
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      <button formAction={signup}>Sign up</button>
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    </form>
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  );
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}

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'use client';
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// replace this line
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import { createClientComponentClient } from '@supabase/auth-helpers-nextjs';
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// with
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import { createClient } from '@/utils/supabase/client';
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export default async function Page() {
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 // replace this line
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 const supabase = createClientComponentClient<Database>();
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 // with
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 const supabase = createClient();
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 return...
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}

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// replace
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import { cookies } from 'next/headers';
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import { createServerComponentClient } from '@supabase/auth-helpers-nextjs';
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// with
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import { createClient } from '@/utils/supabase/server';
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export default async function Page() {
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 // replace
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 const cookieStore = cookies();
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 const supabase = createServerComponentClient<Database>({
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  cookies: () => cookieStore
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 });
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 // with
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 const supabase = createClient();
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 return...
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}

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// replace
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import { createRouteHandlerClient } from '@supabase/auth-helpers-nextjs';
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import { cookies } from 'next/headers';
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// with
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import { createClient } from '@/utils/supabase/server';
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export async function POST(request: Request) {
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 // replace
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 const supabase = createRouteHandlerClient<Database>({
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    cookies: () => cookieStore,
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  });
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  // with
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  const supabase = createClient();
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  return...
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}