sed command not replacing words?

Question

linux

In theory, the sign should be replaced by , and thus the database should be replenished, but something went wrong

root:~/BOT# bash test.sh
ID: 123456789
[12345678, ${id}, 122345678 ,123453434, 1234534564]
root :~/BOT# cat users.txt
[12345678, 122345678 ,123453434, 1234534564]

root:~/BOT# cat test.sh
read -p "ID: " id
sed -e 's/,/, ${id}, /' users.txt

Answer 1

Marat Taganov , quotes must be double:
sed -e "s/,/, ${id},/" users.txt
example:

echo a,b,c > users.txt;read -p "ID: " id; sed -e "s/,/, ${id},/" users.txt
ID: 123456
a, 123456,b,c