How can I set dynamic values in Header

I am trying to write Integration test case using restuse, and able to run test cases finely .
but got stuck when trying to set dynamic value in request header

@HttpTest( method = Method.GET, path = "/somepath",headers = { @Header(name = "authorization", value = "testheader_6")} )

here header accepts only constant value where as I want to set it dynamically ,because value for authorization is generating randomly.

may I know how can I set value to it dynamically.

Thanks in Advance !!!