I want to create attribute option value at product import time. i used some link but i have no luck with this.
Magento2 - programmatically add product attribute options
https://dev98.de/2016/12/21/how-to-create-attribute-options-in-magento2/
https://webkul.com/blog/programmatically-add-options-attribute-magento2/
Please expert any idea where is my mistake?
