Disable csrf.

svelte.config.js

@@ -2,7 +2,7 @@ import node from "@sveltejs/adapter-node"
 import preprocess from "svelte-preprocess"
 
 /** @type {import('@sveltejs/kit').Config} */
-const config = {
+const svelteKitConfig = {
   kit: {
     // By default, `npm run build` will create a standard Node app.
     // You can create optimized builds for different platforms by
@@ -10,6 +10,11 @@ const config = {
     adapter: node({
       precompress: true,
     }),
+
+    csrf: {
+      // Disabling is required for authentication.
+      checkOrigin: false,
+    },
   },
 
   // Consult https://github.com/sveltejs/svelte-preprocess
@@ -17,4 +22,4 @@ const config = {
   preprocess: [preprocess({})],
 }
 
-export default config
+export default svelteKitConfig