* fix logout for auth0
the redirect from logout needs to be registered, and therefore cannot
be an arbitrary path in the server. When the user logs out, they are
redirected to the index page
* no need to provide dataset to logout url
* oauth support, add the token in a configuration specified cookie
Previously, the id token was stored in the session token.
Now, it can be placed in a different cookie with different properties.
* add oauth authentication
Add support for OAuth2.
Change the interface to AuthTypeBase
- better handling of config parameters
- add a complete_setup function for additional setup steps
Added a function wrapper to enforce authentication for the
routes that require authenticaiton.
* change fsspec requirement
fsspec 0.8.0 breaks our tests
it imports a module that is does not require.
bmccandless