Validate a session

curl --request GET \
  --url https://{tenant_id}.hanko.io/sessions/validate

{
  "is_valid": true,
  "expiration_time": "2023-11-07T05:31:56Z",
  "user_id": "<string>",
  "claims": {
    "subject": "c339547d-e17d-4ba7-8a1d-b3d5a4d17c1c",
    "issued_at": "2023-11-07T05:31:56Z",
    "expiration": "2023-11-07T05:31:56Z",
    "audience": [
      "<string>"
    ],
    "issuer": "<string>",
    "email": {
      "address": "jsmith@example.com",
      "is_primary": true,
      "is_verified": true
    },
    "session_id": "c339547d-e17d-4ba7-8a1d-b3d5a4d17c1c"
  }
}