To add a debit card:
Go to Settings
Tap Connected Bank Account
Add a debit card & enter your card details
You will need to confirm your date of birth to help keep your account secure. Brigit will then deposit $.01 into your account to confirm your debit card is linked to your checking account.
Once your debit card has been verified, you will then be able to choose instant delivery when requesting advances.
Here's a video with step by step instructions: