deprecate Azure JWT

saspy/doc/source/configuration.rst

@@ -978,6 +978,8 @@ them here, as they are mutually exclusive. You use only one of the various means
 
 3) Azure JWT (actually, any JWT perhaps, in the future)
 
+   **BEING DEPRECATED - Viya has decided to remove this authentication mechanism for SASPy. In a future release of Viya this will no longer work.**
+
    'jwt' is the key to provide that non-Viya Bearer Token, to then pass through to SASLogon to get the Viya Bearer Token to use.
    And these tokens, are just big long strings; thousands of bytes long strings of random characters
    (so you know you're passing in the right thing).

saspy/sasiohttp.py

@@ -600,6 +600,7 @@ def _authenticate(self, user, pw, authcode, client_id, client_secret, jwt, cv):
             d1          = ("grant_type=authorization_code&code="+uauthcode+
                           "&client_id="+uclient_id+"&client_secret="+uclient_secret).encode(self.encoding)
       elif jwt:
+         logger.warning("BEING DEPRECATED - Viya has decided to remove this authentication mechanism for SASPy. In a future release of Viya this will no longer work.")
          ujwt           = urllib.parse.quote(jwt)
          d1             = "grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer&assertion="+ujwt
          client         = "Basic "+base64.encodebytes((client_id+":").encode(self.encoding)).splitlines()[0].decode(self.encoding)