def login(username, password, activation_token=None, expecting=200):
payload = {"username": username, "password": password}
if activation_token:
payload['activation_token'] = activation_token
r = client.put('/user/login', json=payload, headers=Headers.set())
assert r.status_code == expecting
if r.status_code == 200:
Headers.update(authorization='Bearer %s' % r.json)
return
