fix: Regional API domain processing

Author: manisha1997

tests/unit/rest/test_client.py

@@ -4,6 +4,8 @@
 import aiounittest
 
 from mock import AsyncMock, Mock
+
+from test import client
 from twilio.http.response import Response
 from twilio.rest import Client
 
@@ -80,7 +82,7 @@ def test_periods_in_query(self):
     def test_edge_deprecation_warning(self):
         with warnings.catch_warnings(record=True) as w:
             warnings.simplefilter("always")  # Ensure all warnings are caught
-            self.client.edge = "deprecated-edge"  # Trigger the warning
+            Client(username="username", password="password", edge="edge")  # Trigger the warning
 
             # Check if a warning was raised
             self.assertTrue(len(w) > 0)