AWS Amplify, how to check if user is logged in?

Question

I've been using the aws-amplify library with ionic and was wondering how I would check if a user is logged in? I'm coming from a firebase background so this is quite different. This is so that I can grant access to certain pages based on the user's log in status. In my auth provider I import Amplify {Auth}. I can see that it's possible to get several pieces of data but I'm not sure what to use. There's currentUserPoolUser, getCurrentUser(), getSyncedUser(), currentAuthenticatedUser, currentSession, getCurrentUser(), userSession, currentUserCredentials, currentCredentials and currentUserInfo. I can't seem to find any documentation on any of this either. Everything I've read and watched covers up until the user signs in... Is this all supposed to be done on the client? Thanks.

Answer 1

I'm using the ionViewCanEnter() function in every page to allow/deny access. The return value of this function determines if the page can be loaded or not (and it is executed before running the costructor). Inside this function you have to implement you logic.

In my case, using Amplify, I'm doing this:

async function ionViewCanEnter() {
    try {
        await Auth.currentAuthenticatedUser();
        return true;
    } catch {
        return false;
    }
}

Since amplify currentAuthenticatedUser() return a promise I use async await to wait for the response to know if the user is logged in or not.

Answer 2

Hey I think for now you can only use Auth.currentUserInfo(); to detect whether logged in or not. It will return undefined if you are not logged in or an object if you are.