fix: get env variable dynamically to avoid secret leakage

package.json

@@ -26,8 +26,8 @@
     "typescript": "^5.0.0"
   },
   "scripts": {
-    "build": "tsup src/index.ts src/runtime.ts src/middleware.ts src/routes/login.ts src/routes/callback.ts src/routes/logout.ts src/lib/*.ts --dts --format esm --clean --sourcemap --out-dir dist",
-    "dev": "tsup --watch src/index.ts src/runtime.ts src/middleware.ts src/routes/login.ts src/routes/callback.ts src/routes/logout.ts src/lib/*.ts --dts --format esm --out-dir dist",
+    "build": "tsup",
+    "dev": "tsup --watch",
     "postbuild": "mkdir -p dist/types && cp -R types/*.d.ts dist/types/ || true",
     "prepublishOnly": "npm run build"
   },