fix: Properly handle login errors

src/routes/login/+page.server.ts

@@ -5,6 +5,7 @@ import { redirect } from '@sveltejs/kit';
 import { fail, message, setError, superValidate } from 'sveltekit-superforms';
 import { zod } from 'sveltekit-superforms/adapters';
 import type { Actions } from './$types';
+import type { APIError } from 'better-auth/api';
 
 export async function load({ request }) {
   const session = await auth.api.getSession({
@@ -25,11 +26,12 @@ export const actions = {
     const email = form.data.email;
     const password = form.data.password;
 
+    try {
       if (!form.valid) {
         return fail(400, { form });
       }
 
-    const signin = await auth.api.signInEmail({
+      const signin: Response = await auth.api.signInEmail({
         body: {
           email,
           password,
@@ -50,10 +52,15 @@ export const actions = {
           maxAge: 604800,
           secure: !dev,
         });
-    } else {
+      }
+    } catch (e) {
+      if ((e as APIError).body.code === 'INVALID_EMAIL_OR_PASSWORD') {
         return setError(form, 'password', 'Invalid email or password', {
           status: 401,
         });
+      } else {
+        return setError(form, 'password', (e as APIError).body.code as string);
+      }
     }
 
     return message(form, 'Successfuly signed in.');