diff --git a/Back/skydiveLogs-api.DomainBusiness/UserService.cs b/Back/skydiveLogs-api.DomainBusiness/UserService.cs
index d5c5272..d2b2508 100644
--- a/Back/skydiveLogs-api.DomainBusiness/UserService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/UserService.cs
@@ -23,6 +23,11 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Adds a new user to the system.
+        /// </summary>
+        /// <param name="newUser">The User entity containing the new user data.</param>
+        /// <param name="isAdmin">Whether the new user should have admin privileges.</param>
         public bool AddNewUser(User newUser, bool isAdmin = false)
         {
             newUser.Password = EncryptPassword(newUser.Password);
@@ -45,11 +50,22 @@ namespace skydiveLogs_api.DomainBusiness
             return result;
         }
 
+        /// <summary>
+        /// Retrieves a user by their ID.
+        /// </summary>
+        /// <param name="userId">The user ID to retrieve.</param>
+        /// <returns>A User entity containing the user details.</returns>
         public User GetById(int userId)
         {
             return _userRepository.GetById(userId);
         }
 
+        /// <summary>
+        /// Retrieves a user by their login and password.
+        /// </summary>
+        /// <param name="login">The login name of the user.</param>
+        /// <param name="password">The password to verify the user.</param>
+        /// <returns>A User entity containing the user details.</returns>
         public User GetByLogin(string login, string password)
         {
             return _userRepository.GetByLogin(login, EncryptPassword(password));
@@ -69,7 +85,7 @@ namespace skydiveLogs_api.DomainBusiness
             {
                 Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(encryptionKey,
                                                                 new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 },
-                                                                3, 
+                                                                3,
                                                                 HashAlgorithmName.SHA256);
                 encryptor.Key = pdb.GetBytes(32);
                 encryptor.IV = pdb.GetBytes(16);
@@ -97,4 +113,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}