code: func (r User_Customer_External_Binding_Verisign) ValidateCredentialId(userId *int, externalId *string) (resp bool, err error) {
  	params := []interface{}{
  		userId,
  		externalId,
  	}
  	err = r.Session.DoRequest("SoftLayer_User_Customer_External_Binding_Verisign", "validateCredentialId", params, &r.Options, &resp)
  	return
  }
docs: // Validate the user id and VeriSign credential id used to create an external authentication binding.