PEP 484 and PEP 526 introduced the concept of "type hints" which allow Python code to have inline type declarations to make it easier for editors and static analysis tools to work with Python code.

def add(a: int, b: int) -> int:
    return a + b

To maintain Python 2.7 compatibility, we

There should be routes that trigger an email for "forgot" and "reset" password options. These can be celery tasks but probably need a separate container for a simple SMTP server in order to send the emails.

The fullstack Vue project has an example of a containerized SMTP server.