Error.Username.UnderscopeStart

A username can't start with an underscore.
42
Applied
用户名不能以下划线开头。
12/42
𝐆𝐫𝐨𝐮𝐩, Jan 31, 2019 at 01:13
Applied
用户名不能以下划线开头.
12/42
𝐆𝐫𝐨𝐮𝐩, Mar 11, 2019 at 05:34