To activate the Bally Sports app on your Roku, you must follow these steps. First, go to www.ballysports-yourapplink/activate and click Start Activation. Then enter in your email address and password from your Gavere account or select a new one if you do not already have an account registered with Gavere. Lastly, register for 2FA by following the instructions on screen after clicking Get Started With Two Factor Authentication under Step 3.,