问如何认证gocql到AWS

EN

no EC2 IMDS role found, operation error ec2imds: GetMetadata, request canceled, context deadline exceeded

awsCfg, err := awsConfig.LoadDefaultConfig(ctx)
if err != nil {
    return nil, fmt.Errorf("failed to load AWS config: %w", err)
}

imdsClient := imds.NewFromConfig(awsCfg)

appCreds := aws.NewCredentialsCache(ec2rolecreds.New(func(options *ec2rolecreds.Options) {
        options.Client = imdsClient
}))
cluster := gocql.NewCluster(cassandraHost)

auth := sigv4.NewAwsAuthenticator()
auth.SessionToken = value.SessionToken
auth.AccessKeyId = value.AccessKeyID
auth.SecretAccessKey = value.SecretAccessKey

cluster.Authenticator = auth

session, err := cluster.CreateSession()

no EC2 IMDS role found, operation error ec2imds: GetMetadata, exceeded maximum number of attempts, 3, request send failed, Get \"http://169.254.169.254/latest/meta-data/iam/security-credentials/\": dial tcp 169.254.169.254:80: connect: host is down

session, err := aws_sess.NewSession()
if err != nil {
    return fmt.Errorf("failed to create AWS session: %w", err)
}

creds := credentialsV1.NewChainCredentials(
    []credentialsV1.Provider{
        &credentialsV1.EnvProvider{},
        &ec2rolecredsV1.EC2RoleProvider{
            Client: ec2metadataV1.New(session),
    }})

value, getErr := creds.Get()