fix google oauth fields

src/google.erl

@@ -14,8 +14,8 @@ registration_data(Props, google, Ori)->
     Id = proplists:get_value(<<"id">>, Props),
     Name = proplists:get_value(<<"name">>, Props),
     Image = proplists:get_value(<<"picture">>, Props),
-    GivenName = proplists:get_value(<<"givenName">>, Props),
-    FamilyName = proplists:get_value(<<"familyName">>, Props),
+    GivenName = proplists:get_value(<<"given_name">>, Props),
+    FamilyName = proplists:get_value(<<"family_name">>, Props),
     Email = proplists:get_value(<<"email">>,Props),
     Ori#user{   id = Email,
                 display_name = proplists:get_value(<<"displayName">>, Props),