Trouble adding custom LoginModule to consumeKafkaRecord_2_6 Apache Nifi Flow

I am using the ConsumeKafkaRecord_2_6 processor to consume from kafka. I am trying to use a custom LoginModule. I have both a custom LoginModule and a custom CallbackHandler. I put my two classes in a jar then loaded the jar on the Nifi system. When the processor starts, I get this error: 
Caused by: javax.security.auth.login.LoginException: unable to find LoginModule class: com.eek.my.auth.krb.SauKrbLoginModuleWrapper. I am not sure how to add the jar so that the processor will find my classes. The dynamic property I am adding to reference the custom class is sasl.jaas.config. So the value of that looks like this: sasl.jaas.config=com.eek.my.auth.krb.SauKrbLoginModuleWrapper required krbProvider=com.sun.security.auth.module.Krb5LoginModule;