curl --request GET \
  --url https://test.deribit.com/api/v2/public/fork_token \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 7620,
  "method": "public/fork_token",
  "params": {
    "refresh_token": "1568800656974.1CWcuzUS.MGy49NK4hpTwvR1OYWfpqMEkH4T4oDg4tNIcrM7KdeyxXRcSFqiGzA_D4Cn7mqWocHmlS89FFmUYcmaN2H7lNKKTnhRg5EtrzsFCCiuyN0Wv9y-LbGLV3-Ojv_kbD50FoScQ8BDXS5b_w6Ir1MqEdQ3qFZ3MLcvlPiIgG2BqyJX3ybYnVpIlrVrrdYD1-lkjLcjxOBNJvvUKNUAzkQ",
    "session_name": "forked_session_name"
  }
}
'

{
  "jsonrpc": "2.0",
  "id": 9929,
  "result": {
    "access_token": "1582628593469.1MbQ-J_4.CBP-OqOwm_FBdMYj4cRK2dMXyHPfBtXGpzLxhWg31nHu3H_Q60FpE5_vqUBEQGSiMrIGzw3nC37NMb9d1tpBNqBOM_Ql9pXOmgtV9Yj3Pq1c6BqC6dU6eTxHMFO67x8GpJxqw_QcKP5IepwGBD-gfKSHfAv9AEnLJkNu3JkMJBdLToY1lrBnuedF3dU_uARm",
    "expires_in": 31536000,
    "refresh_token": "1582628593469.1GP4rQd0.A9Wa78o5kFRIUP49mScaD1CqHgiK50HOl2VA6kCtWa8BQZU5Dr03BhcbXPNvEh3I_MVixKZXnyoBeKJwLl8LXnfo180ckAiPj3zOclcUu4zkXuF3NNP3sTPcDf1B3C1CwMKkJ1NOcf1yPmRbsrd7hbgQ-hLa40tfx6Oa-85ymm_3Z65LZcnCeLrqlj_A9jM",
    "scope": "session:named_session mainaccount",
    "token_type": "bearer"
  }
}