Querying json objects

I use jsn for json path queries:

% #{<<"user">> => #{<<"activated">> => true,
%                   <<"id">> => <<"123">>,
%                   <<"name">> => #{<<"first">> => <<"Jane">>,
%                                   <<"last">> => <<"Doe">>}}}

% get the user id
UserId = jsn:get('user.id', User).
% <<"123">>