fix: adds middleware, makes userId not optional

pages/api/availability/_get.ts

@@ -7,7 +7,7 @@ import { stringOrNumber } from "@calcom/prisma/zod-utils";
 
 const availabilitySchema = z
   .object({
-    userId: stringOrNumber.optional(),
+    userId: stringOrNumber,
     username: z.string().optional(),
     dateFrom: z.string(),
     dateTo: z.string(),

pages/api/availability/index.ts

@@ -1,5 +1,9 @@
 import { defaultHandler } from "@calcom/lib/server";
 
-export default defaultHandler({
+import { withMiddleware } from "@lib/helpers/withMiddleware";
+
+export default withMiddleware("HTTP_GET_OR_POST")(
+  defaultHandler({
     GET: import("./_get"),
-});
+  })
+);