Steps to reproduce:
1. Create a new project
2. Import com.unity.multiplayer.widgets package
3. Import com.unity.services.vivox package
4. Import com.unity.netcode.gameobjects package
5. Import Vivox Chat Channel Sample
6. Open MainScene.unity scene
7. In Hierarchy create Multiplayer Widgets > Create > Create Session
8. Enter Play mode
9. Type any session name
10. Press Create
11. Observe as the Vivox automatically logs user in without requiring to input player name
12. Try sending a message

Actual results: 
Getting errors because Vivox is not logged in to a channel, but connected automatically by creating a Multiplayer Session
[Vivox]: System.InvalidOperationException: Unable to call VivoxService.Instance.SendChannelTextMessageAsync because you are not currently in any channels.VivoxService.Instance.JoinGroupChannelAsync|JoinEchoChannelAsync|JoinPositionalChannelAsync must be called first.
UnityEngine.Logger:Log (UnityEngine.LogType,string,object)
Unity.Services.Vivox.VivoxLogger:LogException (System.Exception) (at ./Library/PackageCache/com.unity.services.vivox@563fb2c43dc5/Runtime/SDK/Utils/VivoxLogger.cs:16)
Unity.Services.Vivox.VivoxServiceInternal:EnsureIsInChannel (string,string) (at ./Library/PackageCache/com.unity.services.vivox@563fb2c43dc5/Runtime/VivoxServiceInternal.cs:1387)
Unity.Services.Vivox.VivoxServiceInternal/<SendChannelTextMessageAsync>d__198:MoveNext () (at ./Library/PackageCache/com.unity.services.vivox@563fb2c43dc5/Runtime/VivoxServiceInternal.cs:453)
System.Runtime.CompilerServices.AsyncTaskMethodBuilder:Start<Unity.Services.Vivox.VivoxServiceInternal/<SendChannelTextMessageAsync>d__198> (Unity.Services.Vivox.VivoxServiceInternal/<SendChannelTextMessageAsync>d__198&)
Unity.Services.Vivox.VivoxServiceInternal:SendChannelTextMessageAsync (string,string,Unity.Services.Vivox.MessageOptions)
TextChatUI:SendMessage () (at Assets/Samples/Vivox/16.7.0/Chat Channel Sample/Assets/ChatChannelSample/Scripts/UI/TextChatUI.cs:185)
TextChatUI:EnterKeyOnTextField () (at Assets/Samples/Vivox/16.7.0/Chat Channel Sample/Assets/ChatChannelSample/Scripts/UI/TextChatUI.cs:175)
TextChatUI:<Start>b__12_0 (string) (at Assets/Samples/Vivox/16.7.0/Chat Channel Sample/Assets/ChatChannelSample/Scripts/UI/TextChatUI.cs:48)
UnityEngine.EventSystems.EventSystem:Update () (at ./Library/PackageCache/com.unity.ugui@33c00b5f5ddf/Runtime/UGUI/EventSystem/EventSystem.cs:514)

Expected results: 
Vivox does not connect automatically and gives option when to log into a Vivox channel when creating a multiplayer session

Reproducible with versions:
Vivox 16.7.0 (6000.3.0b2)

Tested on (OS):
MacOS Sequoia 15.6.1