async function login() {
    let r = await post('/login', {
        user: document.getElementById('user').value,
        pass: document.getElementById('pass').value,
        r: REDIRECT_URL,
    })
    if (!r.url.endsWith('/user') && !r.url.endsWith(REDIRECT_URL)) {
        document.getElementById('pass').value = ''
        console.error('login failed')
        alert('Login failed, please make sure you have the right password')
        return
    }
    window.location = REDIRECT_URL || '/user'
}

let passfield = document.getElementById('pass')
function passkeydown(e) {
    if (e.code === 'Enter') {
        login()
    }
}