diff --git a/MCTG/ConsoleApp/Menu/MainMenu.cs b/MCTG/ConsoleApp/Menu/MainMenu.cs
index 9bdc7ad..5f32956 100644
--- a/MCTG/ConsoleApp/Menu/MainMenu.cs
+++ b/MCTG/ConsoleApp/Menu/MainMenu.cs
@@ -1,25 +1,25 @@
-using Model;
-using DataPersistence;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+using Model;
+using DataPersistence;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
 using ConsoleApp.Menu.Core;
 
-namespace ConsoleApp.Menu
-{
-    /// <summary>
-    /// Main menu of the console. Contain the first interaction menus.
-    /// </summary>
-    internal class MainMenu : Menu<IMenu>
-    {
-        public MainMenu(DataManager dataMgr)
-            : base("Main menu",
-                  new Selector<IMenu>(
-                      new SearcherRecipe(new RecipeCollection("search", dataMgr.Data[nameof(Recipe)].Cast<Recipe>().ToArray())), "Recipe search"),
-                  new Selector<IMenu>(
-                      new ConnectionMenu(), "Connection"))
-        { }
-    }
-}
+namespace ConsoleApp.Menu
+{
+    /// <summary>
+    /// Main menu of the console. Contain the first interaction menus.
+    /// </summary>
+    internal class MainMenu : Menu<IMenu>
+    {
+        public MainMenu(DataManager dataMgr)
+            : base("Main menu",
+                  new Selector<IMenu>(
+                      new SearcherRecipe(new RecipeCollection("search", dataMgr.Data[nameof(Recipe)].Cast<Recipe>().ToArray())), "Recipe search"),
+                  new Selector<IMenu>(
+                      new ConnectionMenu(), "Connection"))
+        { }
+    }
+}
diff --git a/MCTG/Model/Managers/MasterManager.cs b/MCTG/Model/Managers/MasterManager.cs
index a093e71..9f39d9f 100644
--- a/MCTG/Model/Managers/MasterManager.cs
+++ b/MCTG/Model/Managers/MasterManager.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Diagnostics;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -23,14 +24,52 @@ namespace Model.Managers
             CurrentConnectedUser = null;
         }
 
-        public bool LogIn(string mail, string password)
+        public bool Login(string mail, string password)
         {
-            if (Users is null)
-                throw new ArgumentNullException();
+            if (Users is null || Users.Count == 0)
+                throw new ArgumentNullException("There is no users registred.");
 
             User user = (User)(from u in Users
                                where u.Mail == mail
                                select u);
+
+            if (user is null || !user.psswMgr.VerifyPassword(user.Password, password))
+                return false;
+
+            CurrentConnectedUser = user;
+            return true;
+        }
+
+        public bool Logout()
+        {
+            if (CurrentConnectedUser is null)
+                return false;
+
+            CurrentConnectedUser = null;
+            return true;
+        }
+
+        public bool Register(User newuser)
+        {
+            try
+            {
+                User user = newuser;
+                DataMgr.Data[nameof(User)].Add(user);
+                Users = DataMgr.GetUsers();
+            }
+            catch (ArgumentException e)
+            {
+                Debug.WriteLine(e.Message);
+                return false;
+            }
+
+            return true;
+        }
+
+        public void AddRecipe(Recipe recipe)
+        {
+            DataMgr.Data[nameof(Recipe)].Add(recipe);
+            Recipes = DataMgr.GetRecipes();
         }
     }
 }