Added Better Auth

src/pages/api/auth/[...all].ts

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+import { auth } from "@/lib/auth";
+import type { APIRoute } from "astro";
+
+export const ALL: APIRoute = async (ctx) => {
+  // If you want to use rate limiting, make sure to set the 'x-forwarded-for' header
+  // to the request headers from the context
+  // ctx.request.headers.set("x-forwarded-for", ctx.clientAddress);
+  
+  return auth.handler(ctx.request);
+};

src/pages/api/auth/check-users.ts

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+import type { APIRoute } from "astro";
+import { db, users } from "@/lib/db";
+import { sql } from "drizzle-orm";
+
+export const GET: APIRoute = async () => {
+  try {
+    const userCountResult = await db
+      .select({ count: sql<number>`count(*)` })
+      .from(users);
+    
+    const userCount = userCountResult[0].count;
+
+    if (userCount === 0) {
+      return new Response(JSON.stringify({ error: "No users found" }), {
+        status: 404,
+        headers: { "Content-Type": "application/json" },
+      });
+    }
+
+    return new Response(JSON.stringify({ userCount }), {
+      status: 200,
+      headers: { "Content-Type": "application/json" },
+    });
+  } catch (error) {
+    return new Response(JSON.stringify({ error: "Internal server error" }), {
+      status: 500,
+      headers: { "Content-Type": "application/json" },
+    });
+  }
+};

src/pages/api/auth/legacy-backup/README.md

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+# Legacy Auth Routes Backup
+
+These files are the original authentication routes before migrating to Better Auth.
+They are kept here as a reference during the migration process.
+
+## Migration Notes
+
+- `index.ts` - Handled user session validation and getting current user
+- `login.ts` - Handled user login with email/password
+- `logout.ts` - Handled user logout and session cleanup
+- `register.ts` - Handled new user registration
+
+All these endpoints are now handled by Better Auth through the catch-all route `[...all].ts`.