Update source/auth/tests/mongodb-aws.md

Co-authored-by: Kevin Albertson <[email protected]>

Author: durran

source/auth/tests/mongodb-aws.md

@@ -26,7 +26,7 @@ Token=AQoDYXdzEJr...<remainder of security token>
 If the driver supports custom AWS credential providers, the driver MUST test the following:
 
 Scenarios 1-6 from the previous section with a user provided `AWS_CREDENTIAL_PROVIDER` auth mechanism property. This
-value MAY be the default credential provider from the AWS SDK. If the default provider does not cover all scenarios
+credentials MAY be obtained from the default credential provider from the AWS SDK. If the default provider does not cover all scenarios
 above, those not covered MAY be skipped. In these tests the driver MUST also assert that the user provided credential
 provider was called in each test. This may be via a custom function or object that wraps the calls to the custom
 provider and asserts that it was called at least once. For test scenarios where the drivers tools scripts put the