从另一个 vuex 商店调用 getter

Question

文件结构：

app
   teams
     teams.vue
     store.js
   user
     store.js
     user.vue
   store.js
   app.js
share
   share.js
   share.vue
   store.js

如何在 share/share.vue 或 share/store.js 中从 app/user/store.js 调用 getUser getUser？