update README

Author: guillp

README.md

@@ -1152,7 +1152,8 @@ assert api.session == session
 ## Token and Authorization Requests serialization
 
 If you implement a web application, you will most likely need to serialize access tokens inside the user session.
-To make it easier, `requests_oauth2client` provides several classes that implement (de)serialization.
+To make it easier, `requests_oauth2client` provides several classes that implement (de)serialization of `BearerToken`,
+'DPoPToken', `AuthorizationRequest` (and derivates) and `DPoPKey` to `bytes`.
 
 ```python
 from requests_oauth2client import BearerToken, TokenSerializer
@@ -1162,9 +1163,9 @@ token_serializer = TokenSerializer()
 bearer_token = BearerToken("access_token", expires_in=60)  # here is a sample token
 serialized_value = token_serializer.dumps(bearer_token)
 print(serialized_value)
-# q1ZKTE5OLS6OL8nPTs1TskLl6iilVhRkFqUWxyeWKFkZmpsZWFiYmJqZ6iiB5eNLKgtSlayUnFITi1KLlGoB
-# you can store that string value in session or anywhere needed
-# beware, this is clear-text!
+# b'q1ZKTE5OLS6OL8nPTs1TskLl6iilVhRkFqUWxyeWKFkZmpsZWFiYmJqZ6iiB5eNLKgtSlayUnFITi1KLlGoB'
+# you can store that value in session or anywhere needed
+# beware, this is decodable clear-text!
 
 # loading back the token to a BearerToken instance
 deserialized_token = token_serializer.loads(serialized_value)
@@ -1229,9 +1230,9 @@ def custom_loader(serialized: bytes) -> dict[str, Any]:
 
 token_serializer = TokenSerializer(make_instance=custom_make_instance, dumper=custom_dumper, loader=custom_loader)
 
-my_custom_token = CustomToken(**{"token_type": "CustomToken", "access_token": "..."})
+my_custom_token = CustomToken(token_type="CustomToken", access_token="...")
 serialized = token_serializer.dumps(my_custom_token)
-assert serialized == b'eyJhY2Nlc3NfdG9rZW4iOiAiLi4uIiwgInRva2VuX3R5cGUiOiAiQ3VzdG9tVG9rZW4ifQ=='
+assert serialized == b"eyJhY2Nlc3NfdG9rZW4iOiAiLi4uIiwgInRva2VuX3R5cGUiOiAiQ3VzdG9tVG9rZW4ifQ=="
 assert token_serializer.loads(serialized) == my_custom_token
 ```