docs: public Ability unbanUser() {
      return builder()
          .name(UNBAN)
          .locality(ALL)
          .privacy(ADMIN)
          .input(1)
          .action(ctx -> {
            String username = stripTag(ctx.firstArg());
            Integer userId = getUserIdSendError(username, ctx);
  
            Set<Integer> blacklist = blacklist();
  
            if (!blacklist.remove(userId))
              silent.sendMd(getLocalizedMessage(ABILITY_UNBAN_FAIL, ctx.user().getLanguageCode(), escape(username)), ctx.chatId());
            else {
              silent.sendMd(getLocalizedMessage(ABILITY_UNBAN_SUCCESS, ctx.user().getLanguageCode(), escape(username)), ctx.chatId());
            }
          })
          .post(commitTo(db))
          .build();
    }