// Extract the username and lookup DN and groups in LDAP.
	ldapUser, isLDAPSTS := claims.Lookup(ldapUserN)
	if isLDAPSTS {
		// Need to lookup the groups from LDAP.
		_, ldapGroups, err := globalIAMSys.LDAPConfig.LookupUserDN(ldapUser)
		if err != nil {
			return fmt.Errorf("unable to query LDAP server for %s: %w", ldapUser, err)
		}

		cred.Groups = ldapGroups
	}

	// Set these credentials to IAM.