pass the search item into url

I am trying to learn react by practising a simple problem.
I followed the below youtube tutorial
https://www.youtube.com/watch?v=AsvybgZTryo&list=PLKhlp2qtUcSZiWKJTi5-5r6IRdHhxP9ZU&index=17

but when I search for an item the item is not passing properly in the api call

https://dummyjson.com/users/search?q=${searchTerm}

can you let me know what is the issue, providing the codse snippet and stackblitz below

useEffect(() => {
    const fetchUsers = () => {
      if (searchTerm.trim() === '') {
        setSuggestions([]);
        return;
      }
      fetch('https://dummyjson.com/users/search?q=${searchTerm}')
        .then((res) => {
          res.json();
        })
        .then((data) => setSuggestions(data))
        .catch((err) => {
          console.log('error', err);
        });
    };
    fetchUsers();
  }, [searchTerm]);