Info Memory: Implement dummy ServiceAccount()

impl/memory/info.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package memory
 
 import (
         "fmt"
 
         "github.com/luci/gae/impl/dummy"
@@ skipping 75 matching lines @@
 }
 
 func (gi *giImpl) DefaultVersionHostname() string {
         return fmt.Sprintf("%s.example.com", gi.appID)
 }
 
 func (gi *giImpl) IsDevAppServer() bool {
         return true
 }
 
+func (gi *giImpl) ServiceAccount() (string, error) {
+        return "user@example.com", nil

[iannucci, 2017/06/28 22:19:51]

maybe

 gae_service_account@example.com

To distinguish it from a user account.

+}
+
 func (gi *giImpl) VersionID() string {
         return curGID(gi.c).versionID
 }
 
 func (gi *giImpl) RequestID() string {
         return curGID(gi.c).requestID
 }
 
 func (gi *giImpl) GetTestable() info.Testable {
         return gi
 }
 
 func (gi *giImpl) SetVersionID(v string) context.Context {
         return useGID(gi.c, func(mod *globalInfoData) {
                 mod.versionID = v
         })
 }
 
 func (gi *giImpl) SetRequestID(v string) context.Context {
         return useGID(gi.c, func(mod *globalInfoData) {
                 mod.requestID = v
         })
 }