Update create_user.cpp

Author: ford-at-aws

cpp/example_code/iam/create_user.cpp

@@ -22,8 +22,10 @@
 #include <aws/core/Aws.h>
 #include <aws/iam/IAMClient.h>
 #include <aws/iam/model/CreateUserRequest.h>
+//snippet-start:[iam.cpp.get_user.inc]
 #include <aws/iam/model/GetUserRequest.h>
 #include <aws/iam/model/GetUserResult.h>
+//snippet-end:[iam.cpp.get_user.inc]
 #include <iostream>
 #include "iam_samples.h"
 //snippet-end:[iam.cpp.create_user.inc]