customId_unlink_bug.js

  errorHandler = error => {
    console.log("Error occurred: %o", error)
  }
  
  linkCustomId = () => {
    const message = new nakamajs.LinkRequest()
    message.custom = Cookies.get('custom_ID')
    return this.client.send(message)
      .then (session => {
        console.log("Successfully linked custom ID to current user.")
      }).catch(this.errorHandler)
  }

  unLinkCustomId = () => {
    const message = new nakamajs.UnlinkRequest()
    message.custom = Cookies.get('custom_ID')
    this.client.send(message)
      .then (session => {
        console.log("Successfully unlinked custom ID to current user.")
      }).catch(this.errorHandler)
  }