Sending http2 get requests with cookies in nodejs - node.js

Question

I'm trying to send an HTTP/2 GET request using nodejs http2 module but I'm having trouble with sending cookies.
I have to read the cookies from a JSON file and send them with the request.
I tried this:
const http2 = require("http2");
const client = http2.connect("http://192.168.1.50");
const fs = require('fs');
var COOKIE = fs.readFileSync('cookies.json', 'utf8');
const req = client.request( {
':path': '/cookies.php',
':method': 'GET',
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0',
'Cookie' : COOKIE,
} )
let data = "";
req.on("response", (headers, flags) => {
for (const name in headers) {
console.log(`${name}: ${headers[name]}`);
}
});
req.on("data", chunk => {
data += chunk;
});
req.on("end", () => {
console.log(data);
client.close();
});
req.end();
cookies.json:
[{"name":"test","value":"12345","domain":"192.168.1.50","path":"/"}]
But it doesn't work, because I made a quick php page that prints $_COOKIE but it prints an empty array
I'm not an expert with HTTP headers, how can I do this?