// Validation code
	switch {
	case conf.AWSRoleWebIdentityTokenFile == "" && conf.AWSRoleARN != "" || conf.AWSRoleWebIdentityTokenFile != "" && conf.AWSRoleARN == "":
		return nil, errors.New("both the token file and the role ARN are required")
	case conf.AccessKey == "" && conf.SecretKey != "" || conf.AccessKey != "" && conf.SecretKey == "":
		return nil, errors.New("both the access and secret keys are required")

	}

	// Validate the received bucket policy document
	if err = bucketLifecycle.Validate(rcfg); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Validate the transition storage ARNs
	if err = validateTransitionTier(bucketLifecycle); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Create a map of updated set of rules in request

## Sample Response

```
<?xml version="1.0" encoding="UTF-8"?>
<AssumeRoleWithClientGrantsResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/">
  <AssumeRoleWithClientGrantsResult>
    <AssumedRoleUser>
      <Arn/>
      <AssumeRoleId/>
    </AssumedRoleUser>
    <Credentials>
      <AccessKeyId>Y4RJU1RNFGK48LGO9I2S</AccessKeyId>
      <SecretAccessKey>sYLRKS1Z7hSjluf6gEbb9066hnx315wHTiACPAjg</SecretAccessKey>

					})
				}
				if stats.hasReplicationUsage() {
					for arn, stat := range stats.Stats {
						metrics = append(metrics, MetricV2{
							Description:    getRepFailedBytesLastMinuteMD(bucketMetricNamespace),
							Value:          float64(stat.Failed.LastMinute.Bytes),
							VariableLabels: map[string]string{"bucket": bucket, "targetArn": arn},
						})
						metrics = append(metrics, MetricV2{

		Code:           "XMinioAdminRemoteRemoveDisallowed",
		Description:    "This ARN is in use by an existing configuration",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrBucketRemoteArnTypeInvalid: {
		Code:           "XMinioAdminRemoteARNTypeInvalid",
		Description:    "The bucket remote ARN type is not valid",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrBucketRemoteArnInvalid: {

		// RemoveRemoteTargetHandler
		adminRouter.Methods(http.MethodDelete).Path(adminVersion+"/remove-remote-target").HandlerFunc(
			adminMiddleware(adminAPI.RemoveRemoteTargetHandler)).Queries("bucket", "{bucket:.*}", "arn", "{arn:.*}")
		// ReplicationDiff - MinIO extension API
		adminRouter.Methods(http.MethodPost).Path(adminVersion+"/replication/diff").HandlerFunc(
			adminMiddleware(adminAPI.ReplicationDiffHandler)).Queries("bucket", "{bucket:.*}")

		case strings.HasPrefix(k, ReservedMetadataPrefixLower+ReplicationReset):
			arn := strings.TrimPrefix(k, fmt.Sprintf("%s-", ReservedMetadataPrefixLower+ReplicationReset))
			if d.ResetStatusesMap == nil {
				d.ResetStatusesMap = make(map[string]string, 1)
			}
			d.ResetStatusesMap[arn] = v
		}
	}
	return d

type SubstringFunc struct {
	Expr *PrimaryTerm `parser:" \"SUBSTRING\" \"(\" @@ "`
	From *Operand     `parser:" ( \"FROM\" @@ "`
	For  *Operand     `parser:"   (\"FOR\" @@)? \")\" "`
	Arg2 *Operand     `parser:" | \",\" @@ "`
	Arg3 *Operand     `parser:"   (\",\" @@)? \")\" )"`
}

// ExtractFunc represents EXTRACT sql function
type ExtractFunc struct {

	//export MyFunction
	func MyFunction(arg1, arg2 int, arg3 string) int64 {...}

	//export MyFunction2
	func MyFunction2(arg1, arg2 int, arg3 string) (int64, *C.char) {...}

They will be available in the C code as:

	extern GoInt64 MyFunction(int arg1, int arg2, GoString arg3);
	extern struct MyFunction2_return MyFunction2(int arg1, int arg2, GoString arg3);

		return
	}

	if sizeS.replTargetStats == nil && len(roi.TargetStatuses) > 0 {
		sizeS.replTargetStats = make(map[string]replTargetSizeSummary)
	}

	for arn, tgtStatus := range roi.TargetStatuses {
		tgtSizeS, ok := sizeS.replTargetStats[arn]
		if !ok {
			tgtSizeS = replTargetSizeSummary{}
		}
		switch tgtStatus {
		case replication.Pending:
			tgtSizeS.pendingCount++