feat(#9): Add sign up

src/routes/auth/confirm/+server.ts

@@ -0,0 +1,22 @@
+import { redirect } from '@sveltejs/kit';
+import { type EmailOtpType } from '@supabase/supabase-js';
+
+export const GET = async (event) => {
+	const {
+		url,
+		locals: { supabase }
+	} = event;
+	const token_hash = url.searchParams.get('token_hash') as string;
+	const type = url.searchParams.get('type') as EmailOtpType | null;
+	const next = url.searchParams.get('next') ?? '/';
+
+	if (token_hash && type) {
+		const { error } = await supabase.auth.verifyOtp({ token_hash, type });
+		if (!error) {
+			throw redirect(303, `/${next.slice(1)}`);
+		}
+	}
+
+	// return the user to an error page with some instructions
+	throw redirect(303, '/auth/auth-code-error');
+};