Add create account functionality

server/api/auth/session.delete.ts

@@ -1,3 +1,19 @@
+import { readAccounts } from "~/server/database";
+
 export default defineEventHandler(async (event) => {
+	const session = await getAccountSession(event);
+	if (session) {
+		const accounts = await readAccounts();
+		const account = accounts.find(
+			account => account.id === session.accountId
+		);
+		if (account && account.type === "anonymous") {
+			throw createError({
+				status: 409,
+				message: "Cannot log out of an anonymous account",
+			});
+		}
+	}
+
 	await clearAccountSession(event);
 })