Convert a std::chrono::system_clock::time_point to std::string

timePointAsString.cpp

static std::string timePointAsString(const std::chrono::system_clock::time_point& tp) {
    std::time_t t = std::chrono::system_clock::to_time_t(tp);
    std::string ts = std::ctime(&t);
    ts.resize(ts.size()-1);
    return ts;
}