Updating the Readme.md file

Author: kishore7snehil

README.md

@@ -88,7 +88,9 @@ For more code samples on how to integrate the auth0-python SDK in your Python ap
 - Delegated ( `authentication.Delegated` )
 - Enterprise ( `authentication.Enterprise` )
 - API Authorization - Get Token ( `authentication.GetToken`)
+- BackChannelLogin ( `authentication.BackChannelLogin`)
 - Passwordless ( `authentication.Passwordless` )
+- PushedAuthorizationRequests ( `authentication.PushedAuthorizationRequests` )
 - RevokeToken ( `authentication.RevokeToken` )
 - Social ( `authentication.Social` )
 - Users ( `authentication.Users` )