fix: handle popup login errors

Mnickii commented 2 weeks ago

Closes #3070

PR Type

Bugfix

Description of the changes

Handle errors when user cancels sing-in popup, or tries to login when there's an already existing login process.

PR checklist

[x] Project builds (yarn build) and changes have been tested in at least two supported browsers (Edge + non-Chromium based browser)
[x] All public APIs (classes, methods, etc) have been documented following the jsdoc syntax
[x] Stories have been added and existing stories have been tested
[ ] Added appropriate documentation. Docs PR:
[ ] License header has been added to all new source files (yarn setLicense)
[x] Contains NO breaking changes

Other information

How to test: Ensure that you initialize MSAL2 with loginType: LoginType.Popup and first try to login and close the popup, then second click the sign in button multiple times without closing the popup.