Hey colleague!
When the user signs-up, is redirected to screen TEMP
In the screen TEMP, you use this trick: Trick: Bulk update records, with an invisible list, and countdown timer = 1sec. There you update all the users properties to FALSE.
Also, create another countdown with 2/3secs (out of the list) that will redirect to the new screen.
In the TEMP screen, you can write something like “LOGGING IN…”, and a loading GIF, that is shown while all this is happening in the background
Hope to have been helpful! 
let me know if that works!
Paolo