Allow-redefinition in mypy

# Refactor

## Component(s) to be refactored

We should run mypy with `--allow-redefinition` flag. It's useful in resources/serialization. Example:
```
def get(self, exploiter: str):
exploiter = Exploiter(exploiter)
```
`exploiter` is the best name for the hypothetical "Exploiter" object. We can't change the argument to `exploiter_string`, because it's obvious that you pass strings into the url.
`--allow-redefinition` is the best way to keep code clean in this case.