echo "Initializing environment"
	mkdir -p "$WORK_DIR"
	mkdir -p "$MINIO_CONFIG_DIR"

	## version is purposefully set to '3' for minio to migrate configuration file
	echo '{"version": "3", "credential": {"accessKey": "minio", "secretKey": "minio123"}, "region": "us-east-1"}' >"$MINIO_CONFIG_DIR/config.json"

	if [ ! -f /tmp/mc ]; then
		wget --quiet -O /tmp/mc https://dl.minio.io/client/mc/release/linux-amd64/mc &&
			chmod +x /tmp/mc

		iamOS.deleteIAMConfig(ctx, getUserIdentityPath(user, userType))
		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() {

	if cred.AccessKey == "" {
		cred, _, _ = getReqAccessKeyV2(r)
	}
	return cred
}

// Extract request params to be sent with event notification.
func extractReqParams(r *http.Request) map[string]string {
	if r == nil {
		return nil
	}

	region := globalSite.Region()
	cred := getReqAccessCred(r, region)

	principalID := cred.AccessKey
	if cred.ParentUser != "" {

func checkKMSActionAllowed(r *http.Request, owner bool, cred auth.Credentials, action policy.KMSAction, resource string) bool {
	return globalIAMSys.IsAllowed(policy.Args{
		AccountName:     cred.AccessKey,
		Groups:          cred.Groups,
		Action:          policy.Action(action),
		ConditionValues: getConditionValues(r, "", cred),
		IsOwner:         owner,
		Claims:          cred.Claims,

```
go run client-grants.go -cid PoEgXP6uVO45IsENRngDXj5Au5Ya -csec eKsw6z8CtOJVBtrOWvhRWL4TUCga

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

		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	if globalSiteReplicationSys.isEnabled() && logger.GetReqInfo(ctx).Cred.AccessKey != globalActiveCred.AccessKey {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrReplicationDenyEditError), r.URL)
		return
	}
	if versioned := globalBucketVersioningSys.Enabled(bucket); !versioned {

```
$ go run client-grants.go -cid PoEgXP6uVO45IsENRngDXj5Au5Ya -csec eKsw6z8CtOJVBtrOWvhRWL4TUCga

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

		deleteKeyEtcd(ctx, ies.client, getUserIdentityPath(user, userType))
		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() {

type RemoteTargetConnectionErr struct {
	Err       error
	Bucket    string
	Endpoint  string
	AccessKey string
}

func (e RemoteTargetConnectionErr) Error() string {
	if e.Bucket != "" {
		return fmt.Sprintf("Remote service endpoint offline, target bucket: %s or remote service credentials: %s invalid \n\t%s", e.Bucket, e.AccessKey, e.Err.Error())
	}

```

Note: In the case of S3, it is possible to create a tier from MinIO running in EC2 to S3 using AWS role attached to EC2 as credentials instead of accesskey/secretkey:

```
mc admin tier add s3 source S3TIER --bucket s3bucket --prefix testprefix/ --use-aws-role
```