Imports github.com/gorilla/mux github.com/gorilla/sessions github.com/tuckersGo/goWeb/web21/model github.com/unrolled/render github.com/urfave/negroni golang.org/x/oauth2 golang.org/x/oauth2/google Standard library imports context crypto/rand encoding/base64 encoding/json fmt io/ioutil log net/http os strconv strings time