Use the .env File don't work

Tell us what’s happening:
When I send the solution of the following code, it says it is wrong.

Your code so far
app.get("/json", (req, res) => {
if (process.env.MESSAGE_STYLE === “uppercase”) {
return res.json({ message: “HELLO JSON” });
return res.json({ message: “hello json” });

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36 Edg/83.0.478.44.

Challenge: Use the .env File

Link to the challenge: