ParseJSONwithregularexpression

i would like to parse a json that looks like this and only get the values:

"{name: \"Username\", id: \"UserId\"}"

This means, i would like to receive "Username" and "UserId".

I am using the <regex> and the regex object is the following:

regex regex1("\\{name: (.+), id: (.+)\\}");

But this doesn't output the values that i am expecting. I would really appreciate a solution to this and if possible the showing me the error that i made.

Language: C++ (since it uses the ECMAscript Regular expression, any answers in other languages are welcomed).

Thank you.