Merged conditionals.

rcon/proto.py

@@ -186,8 +186,7 @@ class Client:
         response = self.communicate(request)
 
         if response.id != request.id:
-            if self.passwd is not None:
-                if self.login(self.passwd):
+            if self.passwd is not None and self.login(self.passwd):
                 return self.run(command, *arguments)
 
             raise RuntimeError('Request ID mismatch.')