NotificationContentFcm {
    collapse_key: "new_reply",
    title: format!("{} @ {}", self.post.username, self.post.discussion_name),
    body: text,
    data: Some(json!({
        "type": "reply",
        "discussion_id": self.post.discussion_id,
        "post_id": self.post.id,
    })),
}


NotificationContentFcm {
    collapse_key: "new_mail",
    title: self.mail.username.to_string(),
    body: text,
    data: Some(json!({
        "type": "new_mail",
    })),
}