return
			} else if policyName == "" {
				writeSTSErrorResponse(ctx, w, ErrSTSInvalidParameterValue,
					fmt.Errorf("None of the given policies (`%s`) are defined, credentials will not be generated", policies))
				return
			}
		}
		claims[iamPolicyClaimNameOpenID()] = policyName
	}

	case globalIsErasure:
		return globalMinioModeErasure
	case globalIsErasureSD:
		return globalMinioModeErasureSD
	default:
		return globalMinioModeFS
	}
}

func iamPolicyClaimNameOpenID() string {
	return globalIAMSys.OpenIDConfig.GetIAMPolicyClaimName()
}

func iamPolicyClaimNameSA() string {
	return "sa-policy"
}