How to create a client for 'X-Auth-Token' authentication over Spring Security implementation on a Rest Service?

I am building an application for practicing an architecture and its balance, I have to create a client for testing purpose, the rest service use tokens for authentication implementing Spring Security that employs: authentication-manager, security http, AuthenticationTokenProcessingFilter, intercept-url and tokens, so after some reading I have to resolve 'X-Auth-Token' inject on headers and authentication part, the following lines are for testing this king of Authentication:

By now we have a client for test authentication and authorization for next steps.

Best regards,