How To Check All The Apps You've Authorized With Your Google, Facebook, And Twitter Accounts
Hundreds of Twitter accounts were hacked with a swastika through a third party app, which means it's probably time to check on your Twitter apps.
Then, click "Revoke access" (obvs).
You can also access the Apps page by clicking your profile picture > Settings and privacy > Apps.
While you're at it, review the apps connected to your Google account.