Made authentication using Dev Auth Tool optional through the use of a scene property; otherwise the account portal is used. Also made the camera clear flags into solid color, so the status text is more readable.

Assets/Scenes/SampleScene.unity

@@ -248,7 +248,7 @@ Camera:
   m_GameObject: {fileID: 963194225}
   m_Enabled: 1
   serializedVersion: 2
-  m_ClearFlags: 1
+  m_ClearFlags: 2
   m_BackGroundColor: {r: 0.19215687, g: 0.3019608, b: 0.4745098, a: 0}
   m_projectionMatrixMode: 1
   m_GateFitMode: 2
@@ -325,6 +325,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 6c676bf5a9c4b4c439178f1f9effb0e8, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+  devAuthAddress: 
 --- !u!4 &1498573725
 Transform:
   m_ObjectHideFlags: 0

Assets/Scripts/EpicVoiceChatTest.cs

@@ -29,6 +29,9 @@ public class EpicVoiceChatTest : MonoBehaviour
     // This also allows multiple clients to connect to the same lobby without having to communicate the ID among each other.
     private const string DebugLobbyId = "a0f6a51f-6b61-4c95-9ed8-a1d508fe4eb6";
 
+    [SerializeField]
+    private string devAuthAddress;
+    
     private readonly StringBuilder status = new StringBuilder("Status:\n");
     
     private PlatformInterface platformInterface;
@@ -247,12 +250,19 @@ public class EpicVoiceChatTest : MonoBehaviour
 #else
     private Credentials GetEpicCredentials()    // This is platform-specific (actually it's not, we can skip this on consoles)
     {
+        if (!string.IsNullOrEmpty(devAuthAddress))
+        {
+            return new Credentials
+            {
+                Id = devAuthAddress,
+                Type = LoginCredentialType.Developer,
+                Token = SystemInfo.deviceName,
+            };
+        }
+
         return new Credentials
         {
-            // Type = LoginCredentialType.AccountPortal,  // Use ExternalAuth on console platform
-            Id = "192.168.1.100:8888",
-            Type = LoginCredentialType.Developer,
-            Token = SystemInfo.deviceName,
+            Type = LoginCredentialType.AccountPortal,   // Use ExternalAuth on console platform
         };
     }