OAuth token is missing can someone help me?

API
7

My current code is

    function test(accessToken) {
    const url = 'https://api.twitch.tv/helix/search/channels?query=a_seagull';
    const headers = {'client-id' : clientID, 'Authorization': 'Bearer ' + accessToken};
    const myHeaders = new Headers(headers);
    console.log(myHeaders.get('Authorization'))
    const options = {
        method: "GET",
        header: myHeaders
    };
    var myRequest = new Request(url,options);
    fetch(myRequest)
        .then( res => res.json() )
        .then( data => {
                console.log(data);
            }
        ).catch(error=>console.log(error));
    }

The error is still “OAuth token is missing”