xBIT user schema in mongodb

{
  "_id": ObjectId,
  "id": String,
  "username": String,
  "password": String,
  "phone": String,
  "createOn": Timestamp,
  "updateOn": Timestamp,
  "userKeys": [
    {
      "id": String,
      "priv": String,
      "createOn": Timestamp,
      "updateOn": Timestamp,
      "effective": Double
    }
  ]
}

• _id: the internal unique id of mongodb.
• id : the unique id of user, distinguish this from _id for readable.
• username:
• password: the password, this field should be encrypted using irreversible encryption algorithm.
• phone: phone number of the user.
• createOn: user registry timestamp.
• updateOn: user information update timestamp.
• userKeys: user key is used as identifier while accessing the user's information or data, each key is an object including fields:
• key : unique id of this key, it should be unique globally.
• priv: the privilege this key is granted. The privilege can be 'read', 'write', 'none'.
• createOn: timestamp of this key created.
• updateOn: timestamp of this key last updated.
• effective: the effective interval of this key.