Revert "Change the regular expression for username"
Revert "Change the regular expression for username"

This reverts commit de376b583c3f168c960af3742bf466b57a96f40a.

bruceyou/NewsBlur,bruceyou/NewsBlur,bruceyou/NewsBlur,bruceyou/NewsBlur,bruceyou/NewsBlur,bruceyou/NewsBlur,bruceyou/NewsBlur,bruceyou/NewsBlur,bruceyou/NewsBlur