// non-empty session tokens.
		if (!cred.IsServiceAccount() && !cred.IsTemp()) ||
			cred.SessionToken == "" {
			continue
		}

		var (
			err    error
			claims *jwt.MapClaims
		)

		if cred.IsServiceAccount() {
			claims, err = getClaimsFromTokenWithSecret(cred.SessionToken, cred.SecretKey)
		} else if cred.IsTemp() {
			var secretKey string
			secretKey, err = getTokenSigningKey()

	}

	if token == "" && cred.IsTemp() && !cred.IsServiceAccount() {
		// Temporary credentials should always have x-amz-security-token
		return nil, ErrInvalidToken
	}

	if token != "" && !cred.IsTemp() {
		// x-amz-security-token should not present for static credentials.
		return nil, ErrInvalidToken
	}

				if u.Credentials.Status == auth.AccountOff {
					return nil, errAccessKeyDisabled
				}
				return nil, errInvalidAccessKeyID
			}
			cred := u.Credentials
			// Expired credentials return error.
			if cred.IsTemp() && cred.IsExpired() {
				return nil, errInvalidAccessKeyID
			}
			return []byte(cred.SecretKey), nil
		} // this means claims.AccessKey == rootAccessKey
		if !globalAPIConfig.permitRootAccess() {

	}
}

// guessUserProvider - guesses the user provider based on the access key and claims.
func guessUserProvider(credentials auth.Credentials) string {
	if !credentials.IsServiceAccount() && !credentials.IsTemp() {
		return madmin.BuiltinProvider // regular users are always internal
	}

	claims := credentials.Claims
	if _, ok := claims[ldapUser]; ok {
		return madmin.LDAPProvider // ldap users
	}

	if cred.Expiration.IsZero() || cred.Expiration.Equal(timeSentinel) {
		return false
	}

	return cred.Expiration.Before(time.Now().UTC())
}

// IsTemp - returns whether credential is temporary or not.
func (cred Credentials) IsTemp() bool {
	return cred.SessionToken != "" && !cred.Expiration.IsZero() && !cred.Expiration.Equal(timeSentinel)
}

			Creds:           mcreds,
			Secure:          globalIsTLS,
			Transport:       tr,
			TrailingHeaders: true,
		})
	}

	// ok == true - at this point

	if ui.Credentials.IsTemp() {
		// Temporary credentials are not allowed.
		return nil, errAuthentication
	}

	return minio.New(driver.endpoint, &minio.Options{

		if ui.Credentials.IsTemp() {
			return nil, errAuthentication
		}
		if subtle.ConstantTimeCompare([]byte(ui.Credentials.SecretKey), pass) != 1 {
			return nil, errAuthentication
		}
	}

	copts := map[string]string{
		"AccessKey": ui.Credentials.AccessKey,
		"SecretKey": ui.Credentials.SecretKey,
	}
	if ui.Credentials.IsTemp() {
		copts["SessionToken"] = ui.Credentials.SessionToken

		if err != nil {
			return updatedAt, addedOrRemoved, effectivePolicies, err
		}
	} else {
		var isTemp bool
		isTemp, _, err = sys.IsTempUser(userOrGroup)
		if err != nil && err != errNoSuchUser {
			return updatedAt, addedOrRemoved, effectivePolicies, err
		}
		if isTemp {
			err = errIAMActionNotAllowed
			return updatedAt, addedOrRemoved, effectivePolicies, err
		}

	currTime := UTCNow()

	var (
		username = cred.AccessKey
		claims   = cred.Claims
		groups   = cred.Groups
	)

	if cred.IsTemp() || cred.IsServiceAccount() {
		// For derived credentials, check the parent user's permissions.
		username = cred.ParentUser
	}

	principalType := "Anonymous"
	if username != "" {
		principalType = "User"

	user, exists := globalIAMSys.GetUser(ctx, accessKey)
	if exists && (user.Credentials.IsTemp() || user.Credentials.IsServiceAccount()) {
		// Updating STS credential is not allowed, and this API does not
		// support updating service accounts.
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAddUserInvalidArgument), r.URL)
		return
	}

	if (cred.IsTemp() || cred.IsServiceAccount()) && cred.ParentUser == accessKey {