Twitch API using Javascript

[Die_Pauls_Zocken]

Hello!
I tried to use the Twitch API with Javascript. I tried this:

const header = {
    headers: {
        'Client-ID': client_id
    }
}
fetch("https://api.twitch.tv/helix/users?login=revedtv", header).then(response => console.log(response))

but I only get this error

Can someone please help me?

PS: Sorry for my bad English.

[BarryCarlyon]

All of Helix requires an oAuth token, you didn’t specify one

https://staging-discuss.dev.twitch.com/t/requiring-oauth-for-helix-twitch-api-endpoints/23916

Authentication is documented here

Authentication