get = async (key) => {
    for await (const entry of log.traverse()) {
      const { op, key: k, value } = entry.payload
      if (op === 'PUT' && k === key) {
        return value
      } else if (op === 'DEL' && k === key) {
        return
      }
    }
  }
Gets a value from the store by key.
@function
@param {string} key The key of the value to get.
@return {*} The value corresponding to key or null.
@memberof module:Databases.Databases-KeyValue
@instance