face: simplify prefix registration APIs with SigningInfo
refs #2932
Change-Id: I9a29cf2925272b9fc90b4fb69a14035a75291928
diff --git a/src/security/validator.hpp b/src/security/validator.hpp
index 5311795..d0faf22 100644
--- a/src/security/validator.hpp
+++ b/src/security/validator.hpp
@@ -34,8 +34,10 @@
#include "signature-sha256-with-ecdsa.hpp"
#include "digest-sha256.hpp"
#include "validation-request.hpp"
+#include "identity-certificate.hpp"
namespace ndn {
+
/**
* @brief Validator is one of the main classes of the security library.
*