The all-new Xcode 10 beta 1 can be downloaded from apple using a valid Apple ID
Download Xcode 10.1 beta 2
A valid Apple ID is required. If your are already logged in in the browser Xcode 10 Beta 1 download will start directly. Else you will be redirected to the login screen. Once you will log in with your Apple ID Xcode 10 Download will begun