"tokens" in Vehicle response

[VahanMargaryan]

Hi everyone, Does anyone knows what are the tokens key in response to the vehicle_data response?
I've monitored and detected that these tokens changed every ~30 minutes, but can't find any documentation about these tokens.

{
  "response": {
    "id": 12345678901234567,
    "vehicle_id": 1234567890,
    "vin": "5YJSA11111111111",
    "display_name": "Nikola 2.0",
    "option_codes": "MDLS,RENA,AF02,APF1,APH2,APPB,AU01,BC0R,BP00,BR00,BS00,CDM0,CH05,PBCW,CW00,DCF0,DRLH,DSH7,DV4W,FG02,FR04,HP00,IDBA,IX01,LP01,ME02,MI01,PF01,PI01,PK00,PS01,PX00,PX4D,QTVB,RFP2,SC01,SP00,SR01,SU01,TM00,TP03,TR00,UTAB,WTAS,X001,X003,X007,X011,X013,X021,X024,X027,X028,X031,X037,X040,X044,YFFC,COUS",
    "color": null,
    "tokens": [abcdef1234567890, 1234567890abcdef],
    "state": "online",
    "in_service": false,
    "id_s": "12345678901234567",
    "calendar_enabled": true,
    "api_version": 7,
    "backseat_token": null,
    "backseat_token_updated_at": null
  }
}