1, 'defaultRegion' => 'us-west-2', 'testCases' => [ [ 'operationName' => 'ListVaults', 'input' => [], 'errorExpectedFromService' => false, ], [ 'operationName' => 'ListVaults', 'input' => [ 'accountId' => 'abcmnoxyz', ], 'errorExpectedFromService' => true, ], ],];