Fix typescript linting

src/app/oauth/authorize/page.tsx

@@ -21,7 +21,7 @@ export default async function AuthorizePage({
   const code_challenge_method = params.code_challenge_method as string | undefined;
 
   if (!session || !session.user || !session.user.id) {
-    const headersList = headers();
+    const headersList = await headers();
     const host = headersList.get('host');
     const prot = process.env.NODE_ENV === 'production' ? 'https' : 'http';
     const baseUrl = `${prot}://${host}`;
@@ -78,6 +78,8 @@ export default async function AuthorizePage({
       throw new Error('No session found during consent handling.');
     }
 
+    if (!client) throw new Error('Client not found during consent handling.');
+
     const consent = formData.get('consent');
 
     const redirectUrl = new URL(redirectUri);