title: How do I initialize a default "data" value to the returned value of a callback function?
body: <p>I am running into an issue being able to initialize a value on App.vue to the result of a function when that function is async.  I also tried setting it to the resolution of a promise but that didn't seem to work either.  In the former case I just get an undefined value, and in the second I just get the ref type for a js promise.  What is the proper way in Vue to initialize a variable to the result of a callback that will complete at a later time?</p>