Of Temples and Totems Hardcoded Username

While exploring the Beta for "Of Temples and Totems" for the RTX release, I didn't seem to be getting anywhere with the Air Temple's puzzles. When I started searching in creative mode, I came across command blocks under the Air Temples beacon. Im unfamilar with how the command blocks are used, but it appears to be using a username that's not mine. Is this potentially hard coded in?

 

Thanks - Jake