Django-allauth stores an empty token_secret with linkedin_oauth2 - oauth-2.0

Question

I'm trying the make further requests to linkedinAPI and to do so I need both token and token_secret.
I have several test accounts in linkedin, the login process success with all of them, however the token_secret stores (for all of them is empty).
Is that an error? I suspect so because using the pair token/token_secret in subsecuent oauth2 calls I get the following from linkedin
{ "errorCode": 0, "message": "[unauthorized]. The token used in the OAuth request is not valid. AQVvM2f2qefU3vULPS-R46DXN8Mnra9ImG14hzeTvMMcXvBVOEiUl4RTZCJrdFZoTfGGN1fFzLvxG-O_UWB8s8EDr35ZsgwW59y4KilndoEkr105Sg2GR90jmUxpqxU572IiARjN5gxAjfoWC4-_UupKlEtafQn23XQqvXeuLvE-FsPAaSA", "requestId": "VOAL1ULK4X", "status": 401, "timestamp": 1395348629428 }
Further details:
I check these tokens using the shell:
from allauth.socialaccount.models import SocialToken
map(lambda st: st.token_secret, SocialToken.objects.all())
And I get empty output:
[u'', u'', u'']

Answer 1

I found a solution myself so I'll explain it.
I'm not very into oauth2 so I don't know about the process neither if it was normal to have an empty secret_token. So I debugged a bit into the django-allauth code, and I saw that the requests they perform use only the token (no secret token)
Then I changed the library and started using the same they do: requests. And with the following simple script I can make any other request to the linkedin API:
def see_my_groups_json(request, url):
import requests
token = SocialToken.objects.get(account__user_id=request.user.pk)
resp = requests.get(url, params={'oauth2_access_token': token.token})
return resp.json()

Answer 2

You should check the SCOPE parameter for linkedin provider. For example, the next configuration requests permission for accessing user's email address, basic profile and to read and share updates on behalf of the user.
SOCIALACCOUNT_PROVIDERS = {
'linkedin_oauth2': {
'SCOPE': ['r_emailaddress', 'r_basicprofile', 'rw_nus'],
'PROFILE_FIELDS': ['id', 'first-name', 'last-name', 'email-address', 'picture-url', 'public-profile-url']
}
}
If after the token generation, we try to make an API call that requires some other privilege, we will get a 401 status code HTTP response.
django-allauth, by default, r_emailaddress scope or none at all, depending on whether or not SOCIALACCOUNT_QUERY_EMAIL is enabled.
Hope this helps you.