[SSR] Get error: Meteor.userId can only be invoked in method calls or publications

[Yuom Theara]

I tried to apply Vue-SSR, but get the error in store: auth.js

  state: {
    userId: Meteor.userId(), // On initial load the userId will come from Meteor
    email: null,
    isEmailVerified: null,
    profile: null,
    userDetailsLoaded: false,
  },
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Meteor.userId can only be invoked in method calls or publications