[#13B7CE169BB4C96069ED9AA62CA67CF2255EB610]
Return the userinfo
templateStringToken::result_type userinfo(StringToken&& token) const;
If present, this function returns a string representing the userinfo (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" ).userinfo() == "jane-doe:pass" );
Linear in `this->userinfo().size()`.
Calls to allocate may throw.
userinfo = user [ ":" [ password ] ]
authority = [ userinfo "@" ] host [ ":" port ]