implement some missing method content

OwnChar/Manager/OwnCharManager.cs

@@ -12,7 +12,7 @@ namespace OwnChar.Manager
         public UserAccount? CurrentUser { get; private set; }
 
         // Data Provider
-        public IDataManager? DataProxy { get; set; }
+        public IDataManager? DataManager { get; set; }
 
         // Manager
         public UserManager Users { get; }
@@ -42,6 +42,7 @@ namespace OwnChar.Manager
             ArgumentException.ThrowIfNullOrWhiteSpace(username, nameof(username));
             ArgumentException.ThrowIfNullOrWhiteSpace(password, nameof(password));
 
+            username = username.Trim().ToLower();
             CurrentUser = proxy.Login(username, Utils.HashPassword(username, password));
 
             return IsLoggedIn;
@@ -53,7 +54,7 @@ namespace OwnChar.Manager
         /// <returns></returns>
         public bool Logout()
         {
-            return DataProxy?.Logout(CurrentUser) ?? true;
+            return DataManager?.Logout(CurrentUser) ?? true;
         }
     }
 }