Hi Eric, to use Amazon Alexa, an Amazon account is required to connect the Soundbar over the network.
1. Install the SmartThings app on your mobile device and then launch it.
2. Enter the Alexa account by following the instructions on the app and then log in the service.
Alexa should now be setup. Should you require additional assistance please reach out to Samsung Support at: 1-800-SAMSUNG (ask for TVs), available 8AM - 12AM EST, 7 days a week.
^Tim