Remove unneeded class from oauth2.py

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>
Fix some bugs in handle_token.

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>
Update the documentation of AuthorizationModel.

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>