fix: mysql returning failing on update

demo/nextjs/lib/auth.ts

@@ -13,6 +13,8 @@ import { reactInvitationEmail } from "./email/invitation";
 import { LibsqlDialect } from "@libsql/kysely-libsql";
 import { reactResetPasswordEmail } from "./email/rest-password";
 import { resend } from "./email/resend";
+import { MysqlDialect } from "kysely";
+import { createPool } from "mysql2/promise";
 
 const from = process.env.BETTER_AUTH_EMAIL || "delivered@resend.dev";
 const to = process.env.TEST_EMAIL || "";
@@ -22,11 +24,15 @@ const libsql = new LibsqlDialect({
 	authToken: process.env.TURSO_AUTH_TOKEN || "",
 });
 
+const mysql = new MysqlDialect(
+	createPool("mysql://user:password@localhost:3306/better_auth"),
+);
+
 export const auth = betterAuth({
 	appName: "Better Auth Demo",
 	database: {
-		dialect: libsql,
-		type: "sqlite",
+		dialect: mysql,
+		type: "mysql",
 	},
 	session: {
 		cookieCache: {