types and db setup

include/hashing.hpp

@@ -0,0 +1,7 @@
+#include <string>
+
+namespace hashing {
+    std::string GenerateSetting(unsigned long cost = 0);
+    std::string HashPassword(const std::string& password, const std::string& setting);
+    bool VerifyPassword(const std::string& password, const std::string& stored_password);
+}