writeSTSErrorResponse(ctx, w, ErrSTSInternalError, err)
		return
	}

	// Call hook for site replication.
	if cred.ParentUser != globalActiveCred.AccessKey {
		replLogIf(ctx, globalSiteReplicationSys.IAMChangeHook(ctx, madmin.SRIAMItem{
			Type: madmin.SRIAMItemSTSAcc,
			STSCredential: &madmin.SRSTSCredential{
				AccessKey:    cred.AccessKey,
				SecretKey:    cred.SecretKey,
				SessionToken: cred.SessionToken,

			if err != nil {
				return nil, err
			}

			// Call hook for site replication.
			replLogIf(context.Background(), globalSiteReplicationSys.IAMChangeHook(context.Background(), madmin.SRIAMItem{
				Type: madmin.SRIAMItemSTSAcc,
				STSCredential: &madmin.SRSTSCredential{
					AccessKey:    cred.AccessKey,
					SecretKey:    cred.SecretKey,

	// mapping.
	updatedAt, err := globalIAMSys.SetTempUser(context.Background(), cred.AccessKey, cred, "")
	if err != nil {
		return nil, err
	}

	replLogIf(context.Background(), globalSiteReplicationSys.IAMChangeHook(context.Background(), madmin.SRIAMItem{
		Type: madmin.SRIAMItemSTSAcc,
		STSCredential: &madmin.SRSTSCredential{
			AccessKey:    cred.AccessKey,
			SecretKey:    cred.SecretKey,
			SessionToken: cred.SessionToken,

	// Call hook for cluster-replication if the service account is not for a
	// root user.
	if newCred.ParentUser != globalActiveCred.AccessKey {
		replLogIf(ctx, globalSiteReplicationSys.IAMChangeHook(ctx, madmin.SRIAMItem{
			Type: madmin.SRIAMItemSvcAcc,
			SvcAccChange: &madmin.SRSvcAccChange{
				Create: &madmin.SRSvcAccCreate{
					Parent:        newCred.ParentUser,
					AccessKey:     newCred.AccessKey,