Working on User authentication

include/type/SaltFilter.h

@@ -0,0 +1,12 @@
+#ifndef SALTFILTER_H_
+#define SALTFILTER_H_
+
+namespace type {
+    enum class SaltFilter
+    {
+        id = 0,
+        salt
+    };
+}
+
+#endif

include/type/UserFilter.h

@@ -0,0 +1,12 @@
+#ifndef USERFILTER_H_
+#define USERFILTER_H_
+
+namespace type {
+    enum class UserFilter
+    {
+        id = 0,
+        username
+    };
+}
+
+#endif