Fix: Unauthorized Access Error For PAR

Author: kishore7snehil

auth0/authentication/pushed_authorization_requests.py

@@ -2,6 +2,8 @@
 
 from .base import AuthenticationBase
 
+from urllib.parse import urlencode
+
 
 class PushedAuthorizationRequests(AuthenticationBase):
     """Pushed Authorization Request (PAR) endpoint"""
@@ -21,12 +23,14 @@ def pushed_authorization_request(
 
         See: https://www.rfc-editor.org/rfc/rfc9126.html
         """
-        return self.authenticated_post(
+        return self.post(
             f"{self.protocol}://{self.domain}/oauth/par",
-            data={
-                "client_id": self.client_id,
+            data=urlencode({
+                "client_id":self.client_id,
+                "client_secret":self.client_secret,
                 "response_type": response_type,
                 "redirect_uri": redirect_uri,
                 **kwargs,
-            },
-        )
+            }),
+            headers={"Content-Type": "application/x-www-form-urlencoded"},
+        )

auth0/rest.py

@@ -152,6 +152,12 @@ def _request(
         # Reset the metrics tracker
         self._metrics = {"retries": 0, "backoff": []}
 
+        if data is None and json is not None and headers:
+            content_type = headers.get("Content-Type", "").lower()  # Get Content-Type 
+            if "application/x-www-form-urlencoded" in content_type:
+                data = json  # Copy JSON data into data
+                json = None  # Prevent JSON from being sent
+
         kwargs = {
             k: v
             for k, v in {