location<login> {
            param("error") {
                handle {
                    call.loginFailedPage(call.parameters.getAll("error").orEmpty())
                }
            }
}
authenticate("gitHubOAuth") {
        location<login>() {
        
            handle {
                val principal = call.authentication.principal<OAuthAccessTokenResponse>()
                if (principal != null) {
                    call.loggedInSuccessResponse(principal)
                } else {
                    call.loginPage()
                }
            }
        }
    }