##### Credentials
{
 "accessKey": "IRBLVDGN5QGMDCMO1X8V",
 "secretKey": "KzS3UZKE7xqNdtRbKyfcWgxBS6P1G4kwZn4DXKuY",
 "expiration": "2018-08-21T15:49:38-07:00",

```
{
  "buckets": [
    "bucket-x"
  ],
  "credentials": {
    "AccessKeyID": "6N2BALX7ELO827DXS3GK",
    "SecretAccessKey": "23JKqAD+um8ObHqzfIh+bfqwG9V8qs9tFY6MqeFR+xxx",

func (f *sftpDriver) getMinIOClient() (*minio.Client, error) {
	mcreds := credentials.NewStaticV4(
		f.permissions.CriticalOptions["AccessKey"],
		f.permissions.CriticalOptions["SecretKey"],
		f.permissions.CriticalOptions["SessionToken"],
	)
	// Set X-Forwarded-For on all requests.
	tr := http.RoundTripper(globalRemoteFTPClientTransport)
	if f.remoteIP != "" {
		tr = forwardForTransport{tr: tr, fwd: f.remoteIP}
	}

```
{
  "buckets": [
    "bucket-x"
  ],
  "credentials": {
    "AccessKeyID": "6N2BALX7ELO827DXS3GK",
    "SecretAccessKey": "23JKqAD+um8ObHqzfIh+bfqwG9V8qs9tFY6MqeFR+xxx",

		// x-amz-security-token should not present for static credentials.
		return nil, ErrInvalidToken
	}

	if !cred.IsServiceAccount() && cred.IsTemp() && subtle.ConstantTimeCompare([]byte(token), []byte(cred.SessionToken)) != 1 {
		// validate token for temporary credentials only.
		return nil, ErrInvalidToken
	}

	// Expired credentials must return error right away.
	if cred.IsTemp() && cred.IsExpired() {

		if region == "" {
			region = "us-east-1"
		}
		clnt, err = minio.New(globalLocalNodeName, &minio.Options{
			Creds:     credentials.NewStaticV4(opts.creds.AccessKey, opts.creds.SecretKey, opts.creds.SessionToken),
			Secure:    globalIsTLS,
			Transport: globalRemoteTargetTransport,
			Region:    region,
		})
		if err != nil {
			return res, err
		}
	}

	var mu sync.Mutex

		deleteKeyEtcd(ctx, ies.client, getMappedPolicyPath(user, userType, false))
		return nil
	}
	if u.Credentials.AccessKey == "" {
		u.Credentials.AccessKey = user
	}
	if u.Credentials.SessionToken != "" {
		jwtClaims, err := extractJWTClaims(u)
		if err != nil {
			if u.Credentials.IsTemp() {
				// We should delete such that the client can re-request
				// for the expiring credentials.

	}

	cred := auth.Credentials{
		AccessKey:    stsCred.AccessKey,
		SecretKey:    stsCred.SecretKey,
		Expiration:   time.Unix(expiry, 0).UTC(),
		SessionToken: stsCred.SessionToken,
		ParentUser:   stsCred.ParentUser,
		Status:       auth.AccountOn,
	}

	// Extract the username and lookup DN and groups in LDAP.
	ldapUser, isLDAPSTS := claims.Lookup(ldapUserN)

		iamOS.deleteIAMConfig(ctx, getMappedPolicyPath(user, userType, false))
		return u, errNoSuchUser
	}

	if u.Credentials.AccessKey == "" {
		u.Credentials.AccessKey = user
	}

	if u.Credentials.SessionToken != "" {
		jwtClaims, err := extractJWTClaims(u)
		if err != nil {
			if u.Credentials.IsTemp() {
				// We should delete such that the client can re-request
				// for the expiring credentials.