Today I installed Magento 2 for the first time in about a year. Once installed I navigated to the admin area and was presented with a two factor auth warning. Here's what I got:
Luckily there's a way to disable this from the terminal using the bin/magento tool:
bin/magento module:disable Magento_TwoFactorAuth
bin/magento cache:flush
Once done you should reload your admin screen and you can login as normal.
Note: Its probably a good idea to leave 2FA enabled on production sites.