Serialization Docstring Update

Author: kishore7snehil

auth0/authentication/back_channel_login.py

@@ -22,13 +22,15 @@ def back_channel_login(
              binding_message (str): Human-readable string displayed on both the device calling /bc-authorize and the user’s 
              authentication device to ensure the user is approves the correct request.
 
-             login_hint (str): A JSON object containing user details for authentication in the iss_sub format.
+             login_hint (str):  JSON string containing user details for authentication in the iss_sub format.Ensure 
+             serialization before passing.
 
              scope(str): "openid" is a required scope.Multiple scopes are separated 
              with whitespace.
 
-             authorization_details (str, list of dict, or dict, optional): JSON string or dictionary representing
+             authorization_details (str, list of dict, optional): JSON string or dictionary representing
              Rich Authorization Requests (RAR) details to include in the CIBA request.
+             If a Python list is provided, the SDK automatically serializes it to a JSON string before sending.
 
              **kwargs: Other fields to send along with the request.
 

auth0/test/authentication/test_back_channel_login.py

@@ -80,7 +80,7 @@ def test_with_authorization_details(self, mock_post):
         g = BackChannelLogin("my.domain.com", "cid", client_secret="clsec")
         g.back_channel_login(
             binding_message="This is a binding message.",
-            login_hint={"format": "iss_sub", "iss": "https://my.domain.auth0.com/", "sub": "auth0|USER_ID"},
+            login_hint= json.dumps({"format": "iss_sub", "iss": "https://my.domain.auth0.com/", "sub": "auth0|USER_ID"}),
             scope="openid",
             authorization_details=[
                 {
@@ -106,7 +106,7 @@ def test_with_authorization_details(self, mock_post):
             "client_id": "cid",
             "client_secret": "clsec",
             "binding_message": "This is a binding message.",
-            "login_hint": {"format": "iss_sub", "iss": "https://my.domain.auth0.com/", "sub": "auth0|USER_ID"},
+            "login_hint": json.dumps({"format": "iss_sub", "iss": "https://my.domain.auth0.com/", "sub": "auth0|USER_ID"}),
             "scope": "openid",
             "authorization_details": json.dumps([
                 {