[#9342FD69170C0052C1386DDF554640E2BB7F4399]
Return the user
templateStringToken::result_type user(StringToken&& token) const;
If present, this function returns a string representing the user (which may be empty). Otherwise it returns an empty string. Any percent-escapes in the string are decoded first.
assert( url_view( "http://jane%2Ddoe:pass@example.com" ).user() == "jane-doe" );
Linear in `this->user().size()`.
Calls to allocate may throw.
userinfo = user [ ":" [ password ] ]
user = *( unreserved / pct-encoded / sub-delims )
password = *( unreserved / pct-encoded / sub-delims / ":" )