Fishtank feeds to mpv bash script

#!/bin/bash

# REQUIREMENTS
# curl - sudo apt install curl
# jq - sudo apt install jq
# mpv - sudo apt install mpv

# INSTRUCTIONS
# FILL IN refresh_token (only once)
# How to get it;
# https://files.catbox.moe/e3bg5m.png

# USAGE
# bash fishtank.sh
# choose a number 1-10 after it asks you via feed >
# press return

refresh_token=""





if [ -z "$refresh_token" ]
then
    echo "Add refresh_token"
    exit
fi

# use the new refresh_token instead of above
if [ -f .refresh_token ]; then
    refresh_token=$(cat .refresh_token)
fi

# get your access and refresh tokens
token_response=$(curl -s 'https://securetoken.googleapis.com/v1/token?key=AIzaSyBOOpV21k6o3cJc56-4uRNb0jDMzIxShMY' -X POST \
--data-raw 'grant_type=refresh_token&refresh_token='$refresh_token'' --compressed)
echo "$token_response" | jq -r '.access_token' > .access_token
echo "$token_response" | jq -r '.refresh_token' > .refresh_token

get_feeds=$(curl -s 'https://www.fishtank.live/api/live-streams' \
-H 'AuthToken: '$(cat .access_token)'' \
--compressed | jq -r '.liveStreams | .[] | "\(.name)|\(.url)"')

while read -r line; do
    feed_count=$[$feed_count +1]
    echo -n "[$feed_count] "
    echo "$line" | cut -d '|' -f1
done <<< "$get_feeds"

read -r -ep "feed > " feed_choice

feed_token=$(sed -n ${feed_choice}p <<< "$get_feeds")

mpv --really-quiet --no-terminal "https://customer-jwh6wms36w6479b4.cloudflarestream.com/$feed_token/manifest/video.m3u8?parentOrigin=https%3A%2F%2Fwww.fishtank.live"