For alexa integration who tuto 'les lalexiens' or documentation is true

hello,
i want to link alexa and HA , so i found a tuto which seems up-to-date

as i get the Error when sending ChangeReport to Alexa: INVALID_ACCESS_TOKEN_EXCEPTION: Access token is not valid. i folow the home-assistant documentation : https://www.home-assistant.io/integrations/alexa.smart_home

rebuild the skill attachment and restart HA without effect.

so I decided to follow the entire documentation to avoid board effect.

at Account linking step i noticed that the tuto and the documentation doesn’t specify the same authorization URI and Token URL;

So my question is who is right ?

my second question is : in the documentation there is a note :
Note: you must use a valid/trusted SSL Certificate and port 443 for account linking to work

as the 443 port is already used by another application on the same machin, how could i change teh 443 port ?

thanks for help