text: /**
   * This contant indicates which document's field is returned
   */
  const SelectField = {
    YES: 1,
    NO: 0,
  };
  
  const ProjectedField = {
    EVENTS_LIST: '_id name start_time end_time image_url',
    CATEGORY_DETAIL: '_id key value',
    STAFFS_LIST: '_id username email phone_number full_name',
    USER_FROM_GROUP: 'users -_id',
  };
  
  const ItemsPerPage = {
    USER_EVENTS_LIST: 10,
    GUESTS_LIST: 10,
    ALL_EVENTS_LIST: 20,
  };
  
  const GuestAction = {
    VERIFY: 'verify',
    APPROVE: 'approve',
    CHECK_IN: 'checkin',
  };
  
  const UserAction = {
    VERIFY: 'verify',
  };
  
  const Email = {
    NAME: 'Easy Event',
    ADDRESS: 'admin.easy-event@mail.namdaoduy.dev',
  };
  
  const EmailSubject = {
    VERIFY_USER: '[Easy-Event] Xác nhận email đăng ký tài khoản',
    VERIFY_GUEST: '[Easy-Event] Xác nhận email đăng ký tham gia sự kiện',
    TICKET_INFO: '[Easy-Event] Vé tham dự sự kiện bởi Easy Event',
  };
  
  const GuestType = {
    PENDING: 'pending',
    APPROVED: 'approved',
    CHECKED: 'checked',
  };
  
  export default {
    SelectField,
    ProjectedField,
    ItemsPerPage,
    GuestAction,
    UserAction,
    Email,
    EmailSubject,
    GuestType,
  };
  