Getting the right format for saving multiselect customer attribute issue?

Question

This is my code:

        $values = ['value1','value2','value3'];
        $customer->setCustomAttribute('customer_attribute_code', $values);
        //\Magento\Customer\Api\CustomerRepositoryInterface
        $this->customerRepository->save($customer);

customer_attribute_code is a custom customer multiselect attribute. I'm trying to save all values from my arrray ($values), but it only save the first value: value1

Do you have any idea why ? I've also tried this format:

     $values[0] = 'value1';
     $values[1] = 'value2';

Thanks

Answer 1

By changing the code into this:

$customer->setCustomAttribute('customer_attribute_code','value1,value2');
$this->customerRepository->save($customer);

I've managed to save the custom customer multiselect attribute values