I've following the docs https://www.progress.com/documentation/sitefinity-cms/request-access-token-for-calling-web-services in order to implement this behavior in my site, but when I make a POST request to https://mysite/Sitefinity/Authenticate/OpenID/connect/token the response always is the Sitefinity authentication HTML form.
I post the following parameters
{"username":"myuser@gmail.com","password":"mypass","grant_type":"password","scope":"openid+offline_access","client_id":"testApp","client_secret":"secret"}
What can be wrong or omitted
thks in advance