case conf.AccessKey == "" && conf.SecretKey != "" || conf.AccessKey != "" && conf.SecretKey == "":
		return nil, errors.New("both the access and secret keys are required")
	case conf.AWSRole && (conf.AWSRoleWebIdentityTokenFile != "" || conf.AWSRoleARN != "" || conf.AccessKey != "" || conf.SecretKey != ""):

```
$ go run ldap.go -u foouser -p foopassword

##### Credentials
{
        "accessKey": "NUIBORZYTV2HG2BMRSXR",
        "secretKey": "qQlP5O7CFPc5m5IXf1vYhuVTFj7BRVJqh0FqZ86S",
        "expiration": "2018-08-21T17:10:29-07:00",

		// More than maxConfigSize bytes were available
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigTooLarge), r.URL)
		return
	}

	password := cred.SecretKey
	kvBytes, err := madmin.DecryptData(password, io.LimitReader(r.Body, r.ContentLength))
	if err != nil {
		adminLogIf(ctx, err)
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigBadJSON), r.URL)
		return

	contentType := r.Header.Get("Content-Type")
	if contentType != "application/octet-stream" {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrBadRequest), r.URL)
		return
	}

	password := cred.SecretKey
	reqBytes, err := madmin.DecryptData(password, io.LimitReader(r.Body, r.ContentLength))
	if err != nil {
		adminLogIf(ctx, err)
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigBadJSON), r.URL)
		return

	return calculateSignatureV2(stringToSign, cred.SecretKey)
}

// Return the signature v2 of a given request.
func signatureV2(cred auth.Credentials, method string, encodedResource string, encodedQuery string, headers http.Header) string {
	stringToSign := getStringToSignV2(method, encodedResource, encodedQuery, headers, "")
	signature := calculateSignatureV2(stringToSign, cred.SecretKey)
	return signature
}

	claims, err := auth.ExtractClaims(token, secret)
	if err != nil {
		if subtle.ConstantTimeCompare([]byte(secret), []byte(globalActiveCred.SecretKey)) == 1 {
			return nil, errAuthentication
		}
		claims, err = auth.ExtractClaims(token, globalActiveCred.SecretKey)
		if err != nil {
			return nil, errAuthentication
		}
	}

	// If AuthZPlugin is set, return without any further checks.

		logger.Startup(color.Blue("   RootUser: ") + color.Bold("%s ", cred.AccessKey))
		logger.Startup(color.Blue("   RootPass: ") + color.Bold("%s \n", cred.SecretKey))
		if region != "" {
			logger.Startup(color.Blue("   Region: ") + color.Bold("%s", fmt.Sprintf(getFormatStr(len(region), 2), region)))
		}
	}

	if globalBrowserEnabled {

	if conf.AccessKey == "" || conf.SecretKey == "" {
		return nil, errors.New("both access and secret keys are required")
	}

	if conf.Bucket == "" {
		return nil, errors.New("no bucket name was provided")
	}

	u, err := url.Parse(conf.Endpoint)
	if err != nil {
		return nil, err
	}

	creds := credentials.NewStaticV4(conf.AccessKey, conf.SecretKey, "")
	opts := &minio.Options{

	req, err := newTestRequest(http.MethodPost, resource, 0, nil)
	if err != nil {
		return nil, err
	}

	// management REST API uses signature V4 for authentication.
	err = signRequestV4(req, cred.AccessKey, cred.SecretKey)
	if err != nil {
		return nil, err
	}
	return req, nil
}

// testServicesCmdHandler - parametrizes service subcommand tests on
// cmdType value.

	}

	// The credentials package in minio-go provides an interface to call the
	// STS API.

	// Initialize credential options
	var stsOpts cr.STSAssumeRoleOptions
	stsOpts.AccessKey = minioUsername
	stsOpts.SecretKey = minioPassword

	if sessionPolicyFile != "" {
		var policy string
		if f, err := os.Open(sessionPolicyFile); err != nil {
			log.Fatalf("Unable to open session policy file: %v", err)
		} else {
			defer f.Close()