Python flask Register/login

I need a module in Python flask for Register/login, the registration with email has to be with a verification email, also we can register using Social media (Google, Facebook, Twitter), and then the user can login with email and social media. I have already started the project, you will need to fix/modify the code.
I'm using Heroku to host my Python flask backend app, MySQL as a database but I'm open to using PostgreSQL as well,