Interface Message

interface Message {
    accept_coaching_group_id?: number;
    activity?: Activity;
    activity_id?: string;
    answer?: string;
    athlete_id?: string;
    attachment_mime_type?: string;
    attachment_url?: string;
    content?: string;
    created?: string;
    deleted?: string;
    deleted_by_id?: string;
    end_index?: number;
    id?: number;
    join_group_id?: number;
    name?: string;
    seen?: boolean;
    start_index?: number;
    type?: MessageType;
}