magento-test/app/code/Magento/JwtUserToken/etc/adminhtml/system.xml

<?xml version="1.0"?>
<!--
  ~ Copyright © Magento, Inc. All rights reserved.
  ~ See COPYING.txt for license details.
  -->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
    <system>
        <section id="webapi" type="text" sortOrder="102" showInDefault="1" showInWebsite="1" showInStore="1">
            <group id="jwtauth" translate="label" type="text" sortOrder="260" showInDefault="1">
                <label>JWT Authentication</label>
                <field id="jwt_alg" translate="label comment" type="select" sortOrder="1" showInDefault="1">
                    <label>Algorithm to sign/encrypt JWTs used for authentication</label>
                    <source_model>Magento\JwtUserToken\Model\Config\JwtAlgorithmSource</source_model>
                    <comment>Selected algorithm will define JWT type used (JWS or JWE)</comment>
                </field>
                <field id="jwe_alg" translate="label comment" type="select" sortOrder="2" showInDefault="1">
                    <label>Content encryption algorithm for JWEs</label>
                    <source_model>Magento\JwtUserToken\Model\Config\JweAlgorithmSource</source_model>
                    <comment>Encryption algorithm for JWT content to be used when JWE algorithm is selected</comment>
                </field>
                <field id="customer_expiration" translate="label comment" type="text" sortOrder="3" showInDefault="1">
                    <label>Customer JWT Expires In</label>
                    <validate>validate-zero-or-greater validate-number</validate>
                    <comment>(minutes)</comment>
                </field>
                <field id="admin_expiration" translate="label comment" type="text" sortOrder="4" showInDefault="1">
                    <label>Admin User JWT Expires In</label>
                    <validate>validate-zero-or-greater validate-number</validate>
                    <comment>(minutes)</comment>
                </field>
            </group>
        </section>
    </system>
</config>