How to use the @cometchat-pro/chat.CometChat.joinGroup function in @cometchat-pro/chat

export const joinPublicGroup = group => {
  return CometChat.joinGroup(group.guid, CometChat.GROUP_TYPE.PUBLIC, "");
};

export const joinPrivateGroup = group => {
  return CometChat.joinGroup(group.guid, CometChat.GROUP_TYPE.PRIVATE, "");
};

export const joinPasswordGroup = (group, password) => {
  return CometChat.joinGroup(
    group.guid,
    CometChat.GROUP_TYPE.PASSWORD,
    password
  );
};