Hello, I set up an account for my daughter with the username "Estelle". Unfortunately, I didn't realize that I should have first chosen a username in Minecraft (because, turns out, Estelle is unavailable in Minecraft). So, her username in Minecraft is now "Book_Hugger" -- but I don't know how to change it for The Sandlot. Thank you!
A Sandlot moderator will be able to change it for you. It shouldn't take too long for it to change. Also, if that certain account ever has a name change, their forums name, in the future, will simply be changed by going into the lobby in-game.
I took care of this for you. You should have gotten another email with the revised username. FYI for other Mods - I removed Estelle from the whitelist.