Add IsFull() and ResetPosition() to User

Also set Token setter to public

Users/User.cs

@@ -8,7 +8,7 @@ namespace Akari.Provider.WaveshareUART.Users
     {
         public string Name { get; private set; }
 
-        public string Token { get; private set; }
+        public string Token { get; set; }
 
         public ushort Start { get; private set; }
         public ushort Position { get; private set; }
@@ -33,7 +33,7 @@ namespace Akari.Provider.WaveshareUART.Users
 
         public bool IncrementPosition()
         {
-            if (Position - Start < UsersManager.RangeLength)
+            if (Count < UsersManager.RangeLength)
             {
                 Position++;
 
@@ -43,8 +43,15 @@ namespace Akari.Provider.WaveshareUART.Users
             return false;
         }
 
+        public bool IsFull() => Count >= UsersManager.RangeLength;
+
         public bool IsInRange(int position) => position >= Start && position < Position;
 
+        public void ResetPosition()
+        {
+            Position = Start;
+        }
+
         public override string ToString() => Name;
     }
 }