I have created a Custom REST API in Magento 2 but getting error "Request does not match any route"

Question

I have created a custom API in magento2, but while hitting it through postman the response is "Request does not match any route" and trace:null

somebody help me please, I am new to Magento. Thanks in advance

My module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../lib/internal/Magento/Framework/Module/etc/module.xsd">
    <module name="Emipro_Customapi" setup_version="1.0.0" active="true">
    </module>
</config>

Webapi.xml

<?xml version="1.0"?>
<routes xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../app/code/Magento/Webapi/etc/webapi.xsd">
    <route url="/V1/gethighlight/:sku" method="GET">
        <service class="EmiproCustomapiApiGethighlight" method="gethighlightdata"/>
        <resources>
            <resource ref="admin"/>
        </resources>
    </route>
</routes>

di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../lib/internal/Magento/Framework/ObjectManager/etc/config.xsd">
    <preference for="EmiproCustomapiApiGethighlight" type="EmiproCustomapiModelGethighlightdata" />
</config>

Answer 1

等待大神答复