user address api from dapp added

Author: pratik-vii

metering/tests/test_contract_api.py

@@ -5,4 +5,7 @@
 
 class TestContractAPI(unittest.TestCase):
     def test_contract_api(self):
-        APIUtilityService().get_user_address('m5FKWq4hW0foGW5qSbzGSjgZRuKs7A1ZwbIrJ9e96rc=', 0)
+        self.assertEqual(
+            APIUtilityService().get_user_address('m5FKWq4hW0foGW5qSbzGSjgZRuKs7A1ZwbIrJ9e96rc=', 0),
+            '0xabd2cCb3828b4428bBde6C2031A865b0fb272a5A'
+        )