loginout.scala

val headers_13 = Map(
        "Accept" -> """*/*""",
        "Origin" -> """http://site.com""",
        "token" -> """token"""
)

val scn = scenario("Scenario Name")
        .exec(http("request_1")
                    .post("http://site.com/login")
                    .headers(headers_1)
                        .param("""player[email]""", """email@address.com""")
                        .param("""player[password]""", """password""")
            )
        .pause(757 milliseconds)

/* more .exec */

.exec(http("request_13")
                    .get("http://site.com/logout")
                    .headers(headers_13)
            )
        .pause(202 milliseconds)

this is excellent! a dynamic header example