handled other SASL mechanism in logging (#861)

Co-authored-by: Aleksandr Mangin <[email protected]>

Author: mangin

CHANGES/852.bugfix

@@ -0,0 +1 @@
+Handled other SASL mechanism in logging (issue #852, pr #861 by @mangin)

aiokafka/conn.py

@@ -337,8 +337,11 @@ async def _do_sasl_handshake(self):
                 'Authenticated via OAUTHBEARER'
             )
         else:
-            self.log.info('Authenticated as %s via PLAIN',
-                          self._sasl_plain_username)
+            self.log.info(
+                'Authenticated as %s via %s',
+                self._sasl_plain_username,
+                self._sasl_mechanism
+            )
 
     def authenticator_plain(self):
         return SaslPlainAuthenticator(