Use unrestricted API for user info

[sposs]

Given #335, I propose to change the URL. The default one is restricted in the number of queries per day.

[sposs]

The tests are failing, but I can't understand why...

[sposs]

This pull request solves one issue (connection using iOS SDK with returns id_token, not access_token), but breaks the login via the /complete/google-oauth endpoint, because this uses the access_token, not the same as id_token.
Not sure how to address this in the end... Any idea?

[sposs]

Solution: try both...

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[sposs]

hello,
I've merged with Master, in the hope to have this merged eventually. Can the checks be enabled?

[codecov]

Codecov Report

Merging #363 (6493817) into master (eeee976) will decrease coverage by 0.01%.
The diff coverage is 71.42%.

@@            Coverage Diff             @@
##           master     #363      +/-   ##
==========================================
- Coverage   76.18%   76.16%   -0.02%     
==========================================
  Files         314      314              
  Lines        9497     9499       +2     
  Branches      465      465              
==========================================
  Hits         7235     7235              
- Misses       2110     2112       +2     
  Partials      152      152              

Flag	Coverage Δ
unittests	76.16% <71.42%> (-0.02%)	⬇️

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Impacted Files	Coverage Δ
social_core/backends/google.py	68.18% <60.00%> (-0.87%)	⬇️
social_core/tests/backends/test_google.py	100.00% <100.00%> (ø)

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