fix: remove token padding strip (GoogleCloudPlatform#245)

Author: jackwotherspoon

google/cloud/sql/connector/refresh_utils.py

@@ -161,9 +161,7 @@ async def _get_ephemeral(
     data = {"public_key": pub_key}
 
     if enable_iam_auth:
-        # TODO: remove this once issue with OAuth2 Tokens is resolved.
-        # See https://github.com/GoogleCloudPlatform/cloud-sql-python-connector/issues/137
-        data["access_token"] = credentials.token.rstrip(".")
+        data["access_token"] = credentials.token
 
     resp = await client_session.post(
         url, headers=headers, json=data, raise_for_status=True