[gnome-online-accounts/wip/rishi/google-identity-userinfo] google: Only request the email field when getting the user's identity

[Debarshi Ray <debarshir src gnome org>]

commit 4ea4f61b58f34e79b8519a60b02efb1579bf6973
Author: Neil McGovern <neil gnome org>
Date:   Thu Jan 31 14:24:19 2019 +0100

    google: Only request the email field when getting the user's identity
    
    Currently, a lot of personal information was being received, including
    gender and profile picture. The email is the only thing that's really
    used, for the account's identity and presentation identy, and the rest
    was being simply thrown away. Therefore, avoid receiving them in the
    first place.
    
    Verified via the Google APIs Explorer and the Google OAuth 2.0
    Playground:
    https://developers.google.com/apis-explorer/#p/oauth2/v2/oauth2.userinfo.get
    https://developers.google.com/oauthplayground/
    
    https://gitlab.gnome.org/GNOME/gnome-online-accounts/merge_requests/19

 src/goabackend/goagoogleprovider.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/goabackend/goagoogleprovider.c b/src/goabackend/goagoogleprovider.c
index cc9a8f89..9e331c11 100644
--- a/src/goabackend/goagoogleprovider.c
+++ b/src/goabackend/goagoogleprovider.c
@@ -172,6 +172,7 @@ get_identity_sync (GoaOAuth2Provider  *oauth2_provider,
   call = rest_proxy_new_call (proxy);
   rest_proxy_call_set_method (call, "GET");
   rest_proxy_call_add_param (call, "access_token", access_token);
+  rest_proxy_call_add_param (call, "fields", "email");
 
   if (!rest_proxy_call_sync (call, error))
     goto out;