format with gofumpt (#18184)

* gofumpt -w -l .

* gofumpt -w -l -extra .

* Add linter

* manual fix

* change make fmt

services/auth/oauth2.go

@@ -53,8 +53,7 @@ func CheckOAuthAccessToken(accessToken string) int64 {
 // OAuth2 implements the Auth interface and authenticates requests
 // (API requests only) by looking for an OAuth token in query parameters or the
 // "Authorization" header.
-type OAuth2 struct {
-}
+type OAuth2 struct{}
 
 // Name represents the name of auth method
 func (o *OAuth2) Name() string {