fix: production issue (#4311)

* fix: production issue

* Update .changeset/soft-tables-ring.md

---------

Co-authored-by: Siddharth Suresh <siddh.suresh@gmail.com>

.changeset/soft-tables-ring.md

@@ -0,0 +1,5 @@
+---
+"@blitzjs/auth": patch
+---
+
+Fix bundling issue that occurs in vercel due to the way imports were handled internally

packages/blitz-auth/src/server/auth-sessions.ts

@@ -183,8 +183,7 @@ export async function getSession(
 
 export async function getBlitzContext(): Promise<Ctx> {
   try {
-    //using eval to avoid bundling next/headers
-    const {headers, cookies} = eval("require('next/headers')")
+    const {headers, cookies} = require("next/headers")
     const req = new IncomingMessage(new Socket()) as IncomingMessage & {
       cookies: {[key: string]: string}
     }
@@ -234,8 +233,7 @@ export async function useAuthenticatedBlitzContext({
   const ctx: Ctx = await getBlitzContext()
   const userId = ctx.session.userId
   try {
-    //using eval to avoid bundling next/navigation
-    const {redirect} = eval("require('next/navigation')")
+    const {redirect} = require("next/navigation")
     if (userId) {
       debug("[useAuthenticatedBlitzContext] User is authenticated")
       if (redirectAuthenticatedTo) {