I decided to trust you since you're a YC company, and put in my creds anyway. To log into my bank, they required me to send a verification code to my phone. The text never came, but your flow has no way to go back and either request the text message again or have them send an email instead, so I'm now stuck on bank account verification. :(
So, areas for improvement:
1) Use bigger text to show you're using a third party for bank login, and maybe some way to verify that.
2) Create a way to request another token via text or change to email.