I tried to use Magento\Customer\Api\AccountManagementInterface::authenticate.
<route url="/V1/customers/auth_custom/:email/
assword" method="GET">
<service class="Magento\Customer\Api\AccountManagementInterface" method="authenticate"/>
<resources>
<resource ref="anonymous"/>
</resources>
</route>
If I submit an existing email from magento using curl, (http://localhost/magento/index.php/rest/V1/customers/auth_custom/roni_cosst@example.com/123123)
it returns the matching email's data. but not matching the password. If I submit a non existing email, it will return this message. {"message":"Invalid login or password."}
Someone help me please. Many thanks