feat: encapsulate identity with better-auth

modules/identity/services/auth.ts

@@ -0,0 +1,29 @@
+import { logger } from "@platform/logger";
+import { betterAuth } from "better-auth";
+import { mongodbAdapter } from "better-auth/adapters/mongodb";
+import { emailOTP } from "better-auth/plugins";
+
+import { db } from "./database.ts";
+
+export const auth = betterAuth({
+  database: mongodbAdapter(db.db),
+  session: {
+    cookieCache: {
+      enabled: true,
+      maxAge: 5 * 60, // Cache duration in seconds
+    },
+  },
+  plugins: [
+    emailOTP({
+      async sendVerificationOTP({ email, otp, type }) {
+        if (type === "sign-in") {
+          logger.info({ email, otp, type });
+        } else if (type === "email-verification") {
+          // Send the OTP for email verification
+        } else {
+          // Send the OTP for password reset
+        }
+      },
+    }),
+  ],
+});