Logout doesn't correctly work

[telepuz]

Project board link

Hello!
I have some trouble with Reaper UI. I configure reaper with shiro authorization. When I use UI, reaper don't ask credentials

How to reproduce:

1. Go to /webui/index.html -> Get webui without authorization
2. Press Logout -> Redirected to login form
3. Enter manually /webui/index.html -> Get webui

Did expected - On first visit get login form. After logout all URLs are redirected to login form

Reaper version: 3.2.1 and 3.3.1

Reaper configuration

cassandra-reaper.yaml

```yaml

segmentCountPerNode: 32
repairParallelism: DATACENTER_AWARE
repairIntensity: 0.9
scheduleDaysBetween: 7
repairRunThreadCount: 15
hangingRepairTimeoutMins: 30
storageType: cassandra
enableCrossOrigin: true
incrementalRepair: false
blacklistTwcsTables: true
enableDynamicSeedList: true
repairManagerSchedulingIntervalSeconds: 5
activateQueryLogger: false
jmxConnectionTimeoutInSeconds: 20
useAddressTranslator: false
maxPendingCompactions: 40
maxParallelRepairs: 8
datacenterAvailability: "EACH"

server:
type: default
applicationConnectors:
- type: http
port: 8080
bindHost: 0.0.0.0
adminConnectors:
- type: http
port: 8081
bindHost: 0.0.0.0
requestLog:
appenders: []

cassandra:
authProvider:
password: password
type: plainText
username: user
clusterName: cassandra-reaper
contactPoints:

• xxx.xxx.xxx.xxx
• xxx.xxx.xxx.xxx
• xxx.xxx.xxx.xxx
  keyspace: reaper_db
  loadBalancingPolicy:
  shuffleReplicas: 'True'
  subPolicy:
  allowRemoteDCsForLocalConsistencyLevel: 'False'
  localDC: dc
  type: dcAwareRoundRobin
  usedHostsPerRemoteDC: '0'
  type: tokenAware

autoScheduling:
enabled: False
initialDelayPeriod: PT15S
periodBetweenPolls: PT10M
timeBeforeFirstSchedule: PT5M
scheduleSpreadPeriod: PT6H

accessControl:
sessionTimeout: PT10M
shiro:
iniConfigs: ["file:/etc/cassandra-reaper/shiro.ini"]

  shito.ini


```ini
[users]
admin = password, operator</details>

┆Issue is synchronized with this Jira Story by Unito
┆Issue Number: REAP-60

[adejanovski]

I can reproduce a similar behavior indeed.
After a few clicks I get redirected to the login form, but it doesn't happen straight away after clicking the logout button indeed.