Add an external xml file containing passwords to class path in Spring boot

I have a spring boot application which reads some passwords from an xml while, which is not part of the jar.

It has to be in a separate folder. How can I add this xml file to the classpath so that getResourceAsStream("myxml.xml") should work?

                MyConfig myConfig = null;
                JAXBContext jaxbContext = JAXBContext.newInstance(MyConfig.class);
                Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
    //This should work
                InputStream is = this.getClass().getClassLoader().getResourceAsStream("myxml.xml");
                myConfig = (MyConfig) jaxbUnmarshaller.unmarshal(is);

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