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diff --git a/src/kernel/KernelKit/UserMgr+User.h b/src/kernel/KernelKit/UserMgr+User.h
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+++ b/src/kernel/KernelKit/UserMgr+User.h
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+// Copyright 2024-2026, Amlal El Mahrouss (amlal@nekernel.org)
+// Licensed under the Apache License, Version 2.0 (see LICENSE file)
+// Official repository: https://github.com/nekernel-org/nekernel
+
+#ifndef KERNELKIT_USERMGR_USER_H
+#define KERNELKIT_USERMGR_USER_H
+
+/* ========================================
+
+ Revision History:
+
+ 04/03/25: Set users directory as /users/ instead of /usr/
+
+ ======================================== */
+
+#include <CompilerKit/CompilerKit.h>
+#include <KernelKit/KPC.h>
+#include <NeKit/Config.h>
+#include <NeKit/KString.h>
+
+///! We got the MGMT, STD (%s format) and GUEST users,
+///! all are used to make authorized operations.
+#define kMgmtUser "NEKERNEL/MGMT/%s"
+#define kGuestUser "NEKERNEL/GUEST/%s"
+#define kStdUser "NEKERNEL/STD/%s"
+
+#define kUsersDir "/users/"
+
+#define kMaxUserNameLen (256U)
+#define kMaxUserTokenLen (256U)
+
+namespace Kernel {
+
+class User;
+
+enum struct UserRingKind : Int32 {
+  kRingInvalid   = 0,
+  kRingStdUser   = 444,
+  kRingSuperUser = 666,
+  kRingGuestUser = 777,
+  kRingCount     = 3,
+};
+
+using UserPublicKey     = Char*;
+using UserPublicKeyType = Char;
+
+/// @brief System User class.
+class User final {
+ public:
+  User() = delete;
+
+  User(const Int32& sel, const Char* username);
+  User(const UserRingKind& kind, const Char* username);
+
+  ~User();
+
+ public:
+  NE_COPY_DEFAULT(User)
+
+ public:
+  bool operator==(const User& lhs);
+  bool operator!=(const User& lhs);
+
+ public:
+  /// @brief Get software ring
+  const UserRingKind& Ring();
+
+  /// @brief Get user name
+  Char* Name();
+
+  /// @brief Is he a standard user?
+  Bool IsStdUser();
+
+  /// @brief Is she a super user?
+  Bool IsSuperUser();
+
+  /// @brief Saves a password from the public key.
+  Bool Save(const UserPublicKey password);
+
+  /// @brief Checks if a password matches the **password**.
+  /// @param password the password to check.
+  Bool Login(const UserPublicKey password);
+
+ private:
+  UserRingKind mUserRing{UserRingKind::kRingStdUser};
+  Char         mUserName[kMaxUserNameLen] = {0};
+  UInt64       mUserFNV{0UL};
+};
+
+/// \brief Alias for user ptr.
+using UserPtr = User*;
+
+/// \brief Current user pointer.
+inline UserPtr kCurrentUser = nullptr;
+
+/// \brief Supervisor pointer.
+inline UserPtr kRootUser = nullptr;
+
+}  // namespace Kernel
+
+#endif /* ifndef KERNELKIT_USERMGR_USER_H */