OptionalauthOptionalavatarOptionalavatarGLTF URL passed to spawn when avatarId is an organization avatar UUID.
OptionaldebugOptionaldefaultFallback avatar ID used when neither an organization avatar nor avatarId is available. Non-UUID values are treated as personal avatars.
Optionalusername
OIDC access token sent as hub join
auth_token; authenticates the bot so it gains room-role permissions (e.g. text_chat).