Use OAuth for logging in with ORCID

[bruvellu]

Currently, it's required to have an ORCID to create an account. The user needs to provide one during registration. However, there's no check to see if this ID is valid, or even if it matches the identity of the person creating the account. Typos can also occur and remain unnoticed.

The solution is to use the ORCID API to integrate its OAuth authentication. This way, the user will be able to register a Cifonauta account by logging in with its ORCID account.

ORCID provides an orcid-auth-widget and a python-orcid interfaces. There are also plenty of documentation and tutorials for ORCID's API.

Alternatively, one can integrate the more generic OpenID from ORCID using one of the many oauth social packages for Django, like python-social-auth. There's also a orcid python package and even a django-orcid package.