Interface ParticipantEvent

interface ParticipantEvent {
    action:
        | "add"
        | "remove"
        | "demote"
        | "promote"
        | "leaver"
        | "join";
    by?: string;
    byPushName?: string;
    groupId: string;
    operation:
        | "add"
        | "remove"
        | "demote"
        | "promote";
    who: string[];
}