type credentialHeader struct {
	accessKey string
	scope     struct {
		date    time.Time
		region  string
		service string
		request string
	}
}

// Return scope string.
func (c credentialHeader) getScope() string {
	return strings.Join([]string{
		c.scope.date.Format(yyyymmdd),
		c.scope.region,
		c.scope.service,
		c.scope.request,
	}, SlashSeparator)
}

	// Also, future updates to AWS might require larger sizes.
	Credentials auth.Credentials `xml:",omitempty"`

	// A percentage value that indicates the size of the policy in packed form.
	// The service rejects any policy with a packed size greater than 100 percent,
	// which means the policy exceeded the allowed space.
	PackedPolicySize int `xml:",omitempty"`
}

	ForceUnlock(ctx context.Context, args LockArgs) (bool, error)

	// Returns underlying endpoint of this lock client instance.
	String() string

	// Close closes any underlying connection to the service endpoint
	Close() error

	// Is the underlying connection online? (is always true for any local lockers)
	IsOnline() bool

	// Is the underlying locker local to this server?
	IsLocal() bool

	if accessKey == "" {
		return np, grid.NewRemoteErr(errors.New("service account name is missing"))
	}

	if err := globalIAMSys.DeleteServiceAccount(context.Background(), accessKey, false); err != nil {
		return np, grid.NewRemoteErr(err)
	}

	return
}

// LoadServiceAccountHandler - reloads a service account on the server.

	// policies and any (LDAP user created) service accounts on the other
	// peer clusters, and if so, reject the cluster replicate add request.
	// This is not yet implemented.

	// VALIDATIONS COMPLETE.

	// Create a common service account for all clusters, with root
	// permissions.

	// Create a local service account.

	// Generate a secret key for the service account if not created already.
	var secretKey string

}

// UserInfo returns claims for authenticated user from userInfo endpoint.
//
// Some OIDC implementations such as GitLab do not support
// claims as part of the normal oauth2 flow, instead rely
// on service providers making calls to IDP to fetch additional
// claims available from the UserInfo endpoint
func (p *providerCfg) UserInfo(ctx context.Context, accessToken string, transport http.RoundTripper) (map[string]interface{}, error) {

			Optional:    true,
			Type:        "csv",
		},
		config.HelpKV{
			Key:         Vendor,
			Description: `Specify vendor type for vendor specific behavior to checking validity of temporary credentials and service accounts on MinIO` + defaultHelpPostfix(Vendor),
			Optional:    true,
			Type:        "string",
		},
		config.HelpKV{
			Key:         ClaimUserinfo,

	date := sumHMAC([]byte("AWS4"+secretKey), []byte(currTime.Format(yyyymmdd)))
	region := sumHMAC(date, []byte(globalMinioDefaultRegion))
	service := sumHMAC(region, []byte(string(serviceS3)))
	signingKey := sumHMAC(service, []byte("aws4_request"))

	signature := hex.EncodeToString(sumHMAC(signingKey, []byte(stringToSign)))

	// final Authorization header
	parts := []string{

		Description:    "STS IAM not initialized, please try again.",
		HTTPStatusCode: http.StatusServiceUnavailable,
	},
	ErrSTSUpstreamError: {
		Code:           "InternalError",
		Description:    "An upstream service required for this operation failed - please try again or contact an administrator.",
		HTTPStatusCode: http.StatusInternalServerError,
	},
	ErrSTSInternalError: {
		Code:           "InternalError",

	_, err = deleteUserRPC.Call(context.Background(), client.gridConn(), grid.NewMSSWith(map[string]string{
		peerRESTUser: accessKey,
	}))
	return err
}

// DeleteServiceAccount - delete a specific service account.
func (client *peerRESTClient) DeleteServiceAccount(accessKey string) (err error) {
	_, err = deleteSvcActRPC.Call(context.Background(), client.gridConn(), grid.NewMSSWith(map[string]string{
		peerRESTUser: accessKey,