isUsernameV2 method
Username regex (v2)
May start with @ Minimum 3 characterss Allowed to use aplhanumeric, underscore ("_"), dash ("-"), and dot (".") characters. Has only one symbols in a row. Symbols can only be used in the middle of name.
Implementation
bool isUsernameV2() => RegVal.hasMatch(
this,
RegexPattern.usernameV2,
);