format with gofumpt (#18184)

* gofumpt -w -l .

* gofumpt -w -l -extra .

* Add linter

* manual fix

* change make fmt

routers/web/auth/oauth.go

@@ -1158,5 +1158,4 @@ func oAuth2UserLoginCallback(authSource *auth.Source, request *http.Request, res
 
 	// no user found to login
 	return nil, gothUser, nil
-
 }