Scrape BibleProject discussion posts from YouVersion bible plans

scrape_bible_plan.sh

#!/bin/bash

PLANID=12345678
JWTTOKEN={{TOKEN}}

for DAY in {1..365}
do
  curl 'https://plans.youversionapi.com/4.0/together/$PLANID/activities?day=$DAY&page=1&order=desc&talk_it_over=0'   \
    -H 'authority: plans.youversionapi.com'   \
    -H 'x-youversion-app-version: 4'   \
    -H 'x-youversion-client: youversion'   \
    -H 'accept-language: en'   \
    -H 'authorization: Bearer $JWTTOKEN'   \
    -H 'content-type: application/json'   \
    -H 'accept: application/json'   \
    -H 'cache-control: no-cache'   \
    -H 'x-youversion-app-platform: web'   \
    -H 'user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36'   \
    -H 'origin: https://my.bible.com'   \
    -H 'sec-fetch-site: cross-site'   \
    -H 'sec-fetch-mode: cors'   \
    -H 'sec-fetch-dest: empty'   \
    -H 'referer: https://my.bible.com/'   \
    --compressed
    -O $DAY.json
done

Thank you for your answer.
So with your help, I could get my token successfully, but after updating JWTTOKEN with the value from the "yva" cookie, I still get the error message:
{"error":"access_denied","error_description":"invalid or expired token"}

Any idea?
Do you think other http headers need to be updated?

Also, how did you find the "https://plans.youversionapi.com/4.0/together/$PLANID/activities?day=$DAY&page=1&order=desc&talk_it_over=0" API ?
When I use the web version, I cannot see any request to the plans.youversionapi.com domain in developer tools on Network tab...