fix(nuxt): return undefined instead of throwing for fetch user info

[wangsijie]

Summary

Wrap fetchUserInfo with trySafe to avoid throwing. When the token expires, this request will fail and throw an error, this error is hard to catch. Developers may check the existance of user to check if the user is authenticated.

Testing

Existing tests should pass.

Checklist

• [x] .changeset
• [ ] unit tests
• [ ] integration tests
• [ ] necessary TSDoc comments