Angel uses OAuth v2 for Authentication.
Register a new application at the Angel List API, and
fill Client Id and Client Secret values in the settings:
SOCIAL_AUTH_ANGEL_KEY = ''
SOCIAL_AUTH_ANGEL_SECRET = ''
extra scopes can be defined by using:
SOCIAL_AUTH_ANGEL_AUTH_EXTRA_ARGUMENTS = {'scope': 'email messages'}
Note: Angel List does not currently support returning state parameter used to validate the auth process.