Create a Checkout session to subscribe emulating billing cycle anchor and proration

foo.sh

curl -X POST https://api.stripe.com/v1/checkout/sessions \
  -u {SECRET_KEY}:  \
  -d cancel_url="https://example.com" \
  -d success_url="https://example.com" \
  -d mode="subscription" \
  -d line_items[0][price]={DAILY_PRICE_ID} \
  -d line_items[0][quantity]=5 \
  -d line_items[1][price]={MONTHLY_PRICE_ID} \
  -d line_items[1][quantity]=1 \
  -d subscription_data[trial_end]=1635724801 \
  -d payment_method_types[0]="card"