Lightening Cable is not working

Hi Apple, I purchased a new lightening cable in July this year.

It has been working fine since yesterday. However as of today it’s not really working well. When plugged in it shows the charging sign for less than a second and then turns off. It’s not my phone as I’ve checked it with a family members charger. There is not damage to the actual lightening cable, so I’m unsure why it’s stopped