1.vim ~/.bash_profile
export GOROOT=/usr/local/Cellar/go/1.13.5/libexec
export GOBIN=/Users/edz/go/bin
2. in vscode settings.json
"go.useLanguageServer": true,
"go.goroot": "",
"go.gopath": "",
"go.inferGopath": true,
"go.autocompleteUnimportedPackages": true,
"go.gocodePackageLookupMode": "go",
"go.gotoSymbol.includeImports": true,
"go.useCodeSnippetsOnFunctionSuggest": true,
"go.useCodeSnippetsOnFunctionSuggestWithoutType": true,
"go.docsTool": "gogetdoc",