There are provided systems and methods for shared network connection credentials on check-in at a user’s home location. The authentication switch device 30, when accepting the request from a function based on the agent program 21, acquires a MAC address from this function, and executes equipment authentication using the acquired MAC address. A foot plate is connected to a distal end of the tether strap, and is intended to be held under a foot of the golfer-under-training.