OptionalguestOptionalisShould a dark theme variant of the avatar be used.
OptionalisIf the given user is a guest user. This is needed as guest users use a different API endpoint.
OptionalsizeAvatar image size. The backend only supports 64px and 512px.
OptionalversionCache-busting value appended as a v query parameter.
Fall back to a generated guest avatar if no avatar is found for the user. Has no effect when
isGuestUseristrue.