Validate a session

curl --request POST \
  --url https://{tenant_id}.hanko.io/sessions/validate \
  --header 'Content-Type: application/json' \
  --data '{
  "session_token": "<string>"
}'

{
  "is_valid": true,
  "expiration_time": "2023-11-07T05:31:56Z",
  "user_id": "<string>"
}