THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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When injecting clients from Spring, one can add 'username' and 'password' values as attributes to jaxrs:client elements or add them to WebClient factory create methods.
Clients in Spring Boot
Please see JAXRSClientSpringBoot documentation on how CXF JAX-RS Clients can be used in a SpringBoot Application.