config.headers.set is not a function

[YaoChing]

When I have set the parameters, this problem will occur when executing the script. Does anyone know what I did wrong?

const interceptor = aws4Interceptor({
options: {
region: process.env.aws_region || "",
service: "execute-api"
},
credentials: {
accessKeyId: process.env.access_key_id || "",
secretAccessKey: process.env.secret_access_key || ""
},
});

let result = await axios({
method: "POST",
url: api_url,
data: data,
headers: {
'Content-Type': 'application/json',
'x-amz-access-token': token
}
});