public void setKeyTabLocation(Resource keyTabLocation) {
        this.keyTabLocation = keyTabLocation;
    }
<p>The location of the keytab. You can use the normal Resource
prefixes like <code>file:</code> or <code>classpath:</code>, but as the
file is later on read by JAAS, we cannot guarantee that <code>classpath</code>
works in every environment, esp. not in Java EE application servers. You
should use <code>file:</code> there.
<p>
This file also needs special protection, which is another reason to
not include it in the classpath but rather use <code>file:/etc/http.keytab</code>
for example.

@param keyTabLocation The location where the keytab resides
pac4j-kerberos/src/main/java/org/pac4j/kerberos/credentials/authenticator/SunJaasKerberosTicketValidator.java