Imports github.com/gorilla/mux github.com/prometheus/client_golang/prometheus github.com/prometheus/client_golang/prometheus/promhttp github.com/rs/zerolog github.com/rs/zerolog/log golang.org/x/oauth2/google google.golang.org/api/admin/directory/v1 gopkg.in/yaml.v2 Standard library imports context encoding/json flag io/ioutil net/http os os/signal strconv syscall time