Show error message to user, if authProvider login fails

[Laurin-W]

Right now, there is nothing shown to the user, when I'm trying to log in using the login component and an error is thrown:
An error is thrown, e.g. here:

semapps/src/frontend/packages/auth-provider/src/authProvider.js

Line 52 in 21411f8

throw new Error('auth.message.unreachable_auth_server');

[srosset81]

Probably something to do on the LocalLoginPage component or equivalent, as shown in this example:

https://marmelab.com/react-admin/useLogin.html

[Laurin-W]

Ah thanks, so this will go here: https://github.com/activitypods/activitypods/blob/master/app-framework/react/src/components/PodLoginPage.tsx

Created an issue for APods activitypods/activitypods#301