Merge pull request #10 from noppoMan/noppoMan-patch-1

make body data as message when error is unknown

Sources/Core/AWSClient.swift

@@ -193,7 +193,7 @@ public struct AWSClient {
                 throw AWSRawError(errorCode: errorCode, message: message)
             }
 
-            throw AWSRawError(errorCode: "Unknown", message: nil)
+            throw AWSRawError(errorCode: "Unknown", message: String(data: data, encoding: .utf8))
         }
 
         var outputDict: [String: Any] = [:]