set clientID

[MehdiSadeghii]

after setting client ID, ESP32 tries to connect as anonymous user.

here is the code where I set my connection credentials.

mqttClient.setServer(const_cast <char*>(configurations.brokerAddress.c_str()), configurations.brokerPort);
mqttClient.setCredentials(const_cast<char*>(configurations.brokerUser.c_str()), const_cast<char*>(configurations.brokerPassword.c_str()));

String clientID = WiFi.macAddress();
clientID = clientID + generateRandomString(10);

mqttClient.setClientId(const_cast<char*>(clientID.c_str()));
.