Multiple response http status in Spring MVC

Having the following code:

@RequestMapping(value =  "/system/login", method = RequestMethod.GET)
public void login(@RequestBody Login login) {
    if(login.username == "test" && login.password == "test") {
         //return HTTP 200
    }
    else {
         //return HTTP 400
    }
}

I would like to return two different HTTP statuses based on my logic. What is the best way to achieve this?