Copy sub as the uid of verified claims (#13)

Author: hiranya911

firebase_admin/auth.py

@@ -276,9 +276,11 @@ def verify_id_token(self, id_token):
         if error_message:
             raise crypt.AppIdentityError(error_message)
 
-        return jwt.verify_id_token(
+        verified_claims = jwt.verify_id_token(
             id_token,
             self.FIREBASE_CERT_URI,
             audience=project_id,
             kid=header.get('kid'),
             http=_http)
+        verified_claims['uid'] = verified_claims['sub']
+        return verified_claims

tests/test_auth.py

@@ -210,6 +210,7 @@ def setup_method(self):
     def test_valid_token(self, authtest, id_token):
         claims = authtest.verify_id_token(id_token)
         assert claims['admin'] is True
+        assert claims['uid'] == claims['sub']
 
     @pytest.mark.parametrize('id_token,error', invalid_tokens.values(),
                              ids=list(invalid_tokens))