authorize is possibile only by GET and not by POST

[gianpaolo-tndigit]

as specific OIDC https://openid.net/specs/openid-connect-core-1_0.html#AuthorizationEndpoint authorization endpoint MUST support the use of the HTTP GET and POST methods.

But if you try a POST request AAC responds with a 404:

{
"timestamp": 1694761098342,
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/oauth/authorize"
}

[gianpaolo-tndigit]

close with #425