Import getpass from getpass, instead of using getpass.getpass everytime.

examples/IoT_TestDevice.py

@@ -152,7 +152,7 @@ if __name__ == '__main__':
     if opts.jid is None:
         opts.jid = input("Username: ")
     if opts.password is None:
-        opts.password = getpass.getpass("Password: ")
+        opts.password = getpass("Password: ")
 
 
     xmpp = IoT_TestDevice(opts.jid,opts.password)