POST /self/{shopId}/customization/storefront/background
POST
/self/{shopId}/customization/storefront/background
curl \
--request POST 'https://dev.sellpass.io/self/{shopId}/customization/storefront/background' \
--header "Authorization: $API_KEY" \
--header "Content-Type: multipart/form-data" \
--form "file=@file"