code: async def get_access_token(self, oauth_verifier, request_token=None, loop=None, **params):
          
          # Possibility to provide REQUEST DATA to the method
          if not isinstance(oauth_verifier, str) and self.shared_key in oauth_verifier:
              oauth_verifier = oauth_verifier[self.shared_key]
  
          if request_token and self.oauth_token != request_token:
              raise web.HTTPBadRequest(
                  reason='Failed to obtain OAuth 1.0 access token. '
                         'Request token is invalid')
  
          data = await self.request('POST', self.access_token_url, params={
              'oauth_verifier': oauth_verifier, 'oauth_token': request_token}, loop=loop)
  
          self.oauth_token = data.get('oauth_token')
          self.oauth_token_secret = data.get('oauth_token_secret')
  
          return self.oauth_token, self.oauth_token_secret, data
docs: Get access_token from OAuth1 provider.
  
          :returns: (access_token, access_token_secret, provider_data)