Validate invitation

curl --request GET \
  --url https://api.wacht.dev/deployment/invitations/validate \
  --cookie session_id=

{
  "status": 200,
  "message": "",
  "data": {
    "valid": true,
    "message": "<string>",
    "error_code": "<string>",
    "first_name": "<string>",
    "last_name": "<string>",
    "email": "<string>"
  },
  "session": {
    "id": "123456789012345678",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  },
  "errors": [
    {
      "code": "INVALID_CREDENTIALS",
      "message": "Invalid credentials. Please try again."
    }
  ]
}