Fix for an issue with Nitro

One thing I've noticed recently, I tried changing my name to "Max" but since I have a custom discrim of #0001, and Max#0001 is taken, it wouldn't let me get that name. Unlike if i didnt have Nitro, it would've given me a new Discriminator since I don't control that. So now, I have to test all 9999 discriminators to see which isn't taken. If there was a way to see a list of discrims that arent taken, that would be fantastic. Or just, give me a new number like if i didnt have Nitro