* Add unit tests to enforce email case insensitivity
* Handle email as case insentitive while retrieving user in DB
* Apply isort/black
* Add migration doc
* Use UUID for user id and oauth account id
* Update documentation for UUID
* Tweak GUID definition of SQLAlchemy to match Tortoise ORM one
* Write migration doc
I was getting an import error using tortoise 0.1.1: `ImportError: cannot import name 'Model' from 'tortoise'`. These few changes seemed to have resolved the issue.
* Move users router in sub-module
* Factorize UserRouter into EventHandlersRouter
* Implement OAuth registration/login router
* Apply isort/black
* Remove temporary pytest marker
* Fix httpx-oauth version in lock file
* Ensure ON_AFTER_REGISTER event is triggered on OAuth registration
* Add API on FastAPIUsers to generate an OAuth router
* Improve test coverage of FastAPIUsers
* Small fixes
* Write the OAuth documentation
* Fix SQL unit-tests by avoiding collisions in SQLite db files
* Inject every model variations in router and DB model in DB adapters
* Update documentation and import Tortoise in db module
* Use path operation decorator dependencies for superuser routes
* add tortoise to dependencies
* add tortoise as optional dependency in pyproject.toml
* add tortoise support (tests needed)
* Add tortoise support (also defined orm_mode in pydantic model
* tests for tortoise support
* format by black
* docs for tortoise
* delete type annotations
* delete underscore
* do it in 1 line
* add 1 line before yield
* fix in docs
* fix bug and add annotation for test
* Tweak documentation and fix Tortoise error about id update
* Improve Tortoise coverage by using get instead of filter
* Fix Pipfile.lock
