Authorizing Instagram Access to Twitter Account With Two Factor Authentication

I had some issues reauthorizing the Instagram app's access to my Twitter account because I have Twitter's two factor authentication turned on. The login page doesn't handle the authentication code Twitter sends me via SMS. 

The solution is to generate a temporary app password from Twitter. In the "Security and Privacy" settings, there's a "Generate app password" button. Use that instead of your normal Twitter password in the authentication page inside Instagram and it'll work.