As we know, user name is important for social media user, not just for personal brands, but also for people to remember you. But I found some problems when I was testing YOURS registration.

Just like steemit's personal homepage (@jubi), yours's personal homepage is https://www.yours.org/user/jubi, and Jubi is my registered user name.

Now let's see what the problem is：

1. You can register if you don't enter a username

Then, what is your username, its a random character string like :47eb5de4 , It's hard to remember, and it's harder to build personal brands. Most importantly, you can't modify the user name generated by this system.
SO, here need a user name detection.

2.You can register if you enter an existing user name

You can register if you enter an existing user name,but your username will become that like this:jubi47eb5de4 ,It's hard to remember, and it's harder to build personal brands. Most importantly, you can't modify the user name generated by this system.