Trying to create new channel point redemption

I did everything you said and got it to work. My issue now is when trying to create a channel redemption I am getting the error shown below.

I used the “OAuth authorization code flow” to get the access token.

axios.post('https://api.twitch.tv/helix/channel_points/custom_rewards?broadcaster_id={Channel_id}', {
                    headers: {
                        "Client-ID": client_id,
                        "Authorization": "Bearer " + access_token
                    },
                }, {
                    "title": "game analysis 1v1",
                    "cost": 50000
                }).then(function (response) {
                    console.log(response.data);
                }).catch(function (error) {
                    console.log(error);
                })

Error:

data: {
error: ‘Unauthorized’,
status: 401,
message: ‘OAuth token is missing’
}