def oauth_session(request, state=None, token=None):
    """ Constructs the OAuth2 session object. """
    if settings.DISCORD_REDIRECT_URI is not None:
        redirect_uri = settings.DISCORD_REDIRECT_URI
    else:
        redirect_uri = request.build_absolute_uri(
            reverse('discord_bind_callback'))
    scope = (['email', 'guilds.join'] if settings.DISCORD_EMAIL_SCOPE
             else ['identity', 'guilds.join'])
    return OAuth2Session(settings.DISCORD_CLIENT_ID,
                         redirect_uri=redirect_uri,
                         scope=scope,
                         token=token,
                         state=state)
Constructs the OAuth2 session object.