async/await actions in Vuex
You're not awaiting the Vue.http.get() promise in the getResource() method, so await dispatch('getResource') will resolve before the HTTP request has resolved.
Trimmed down:
async getResource() { let response try { response = await Vue.http.get('https://mysite/api/getResource') } catch (ex) { // Handle error return } // Handle success const data = response.body}