action.js

import Client from 'services/Client.service'

let myClients
let client_promise = Client.get();

client_promise.then(response =>{
    myClients = response
})
.catch(error => {
    console.log("error: ", error)
})

//Even use it with Async Await!!
let app = {
    async initialize(){
        //Async await es2017
        try{
           myClients = await Client.get()
        }
        catch(error){
            console.log("error: ", error)        
        }
    }
}

app.initialize();