Override Tostring in ConnectionId

Fix test method name

Author: dennis-gr

lib-vau-csharp-test/VauClientTest.cs

@@ -57,7 +57,7 @@ public async Task VauHttpClientHandlerDoesDecryptionAndEncryptionWhenCallingAnAp
         }
 
         [Test]
-        public void UsageWitIHttpClientFactory()
+        public void UsageWithIHttpClientFactory()
         {
             var services = new ServiceCollection();
             services.AddTransient<VauHttpClientHandler>();

lib-vau-csharp/data/ConnectionId.cs

@@ -22,7 +22,7 @@ namespace lib_vau_csharp.data
 {
     public class ConnectionId
     {
-        public string Cid { get; private set; }
+        public string Cid { get; }
         public ConnectionId(string cid)
         {
             Cid = cid;
@@ -32,6 +32,8 @@ public static ConnectionId CreateRandom()
         {
             return new ConnectionId((DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond).ToString());
         }
+
+        public override string ToString() => Cid;
     }
 
 }