zcoinCenters: [{
  _id: Schema.Types.ObjectId,
  title: {
    [config.locales.vi]: String,
    [config.locales.en]: String
  },
  content: {
    [config.locales.vi]: String,
    [config.locales.en]: String
  },
  icon: String,
  order: Number,
  type: {
    type: String,
    enum: config.zcoinCenter.all.split(' ')
  },
  active: {
    type: Boolean,
    default: false
  }
}]


zcoinCenter: {
  all: 'bill rating referral onlineCategory',
  bill: 'bill',
  rating: 'rating',
  referral: 'referral',
  onlineCategory: 'onlineCategory'
}