def static setSecrets(Job delegate, Map overrides = [:]) {
    def liveUsername
    def livePassword
    def file
    new URL('https://path/file').withInputStream { i ->
        file.withOutputStream {
            it << i
        }
    }
    file.withReader { liveUsername = it.readLines().get(0) }
    file.withReader { livePassword = it.readLines().get(1) }

    def options = [
            IDENTITY_USER: liveUsername,
            IDENTITY_PASSWORD: livePassword]

    setEnv(delegate, options, overrides)

}

java.lang.NullPointerException: Cannot invoke method withOutputStream() on null object