410 Gone Problem
$ go get -u gitlab.com/johnny/logger
go: finding gitlab.com/johnny/logger latest
go: downloading gitlab.com/johnny/logger v0.0.0-20190921175342-61a76c096369
verifying gitlab.com/johnny/logger@v0.0.0-20190921175342-61a76c096369
reading https://sum.golang.org/lookup/gitlab.com/johnny/logger@v0.0.0-20190921175342-61a76c096369: 410 Gone
Solution
$ go env -w GOPRIVATE=gitlab.com/johnny