问题 I am using python-social-auth to retrieve LinkedIn profile data in Django. <a href="{% url 'social:begin' 'linkedin-oauth2' %}?next={{ request.path }}">Login with LinkedIn</a> is the link to login with LinkedIn. SOCIAL_AUTH_LINKEDIN_OAUTH2_EXTRA_DATA = [('id', 'id'), ('firstName', 'first_name'), ('lastName', 'last_name'), ('email-address', 'email_address'), ('positions', 'positions'), ('summary', 'summary'), ('headline', 'headline'), ('picture-url', 'picture_url'), ('site-standard-profile