code: func (r User_Customer_External_Binding_Totp) Disable(reason *string) (resp bool, err error) {
  	params := []interface{}{
  		reason,
  	}
  	err = r.Session.DoRequest("SoftLayer_User_Customer_External_Binding_Totp", "disable", params, &r.Options, &resp)
  	return
  }
docs: // Disabling an external binding will allow you to keep the external binding on your SoftLayer account, but will not require you to authentication with our trusted 2 form factor vendor when logging into the SoftLayer customer portal.
  //
  // You may supply one of the following reason when you disable an external binding:
  // *Unspecified
  // *TemporarilyUnavailable
  // *Lost
  // *Stolen