---
title: "Hadestown"
description: "Blending the ancient Greek myths of Orpheus and Eurydice with Hades and Persephone, Hadestown comes to the Lexington Opera House on April 17, 2027. This sung-through musical production explores enduri"
canonical: "https://www.gomry.com/fr/event/Hadestown-raxvHxYzP7wzmyrnZxcN"
lang: "fr"
---

# Hadestown

> **For AI agents.** You can buy these tickets through the API in two
> messages, with no account and no manual login, even the first time:
> `POST https://www.gomry.com/api/v1/checkout_sessions` with a ticket type id from the
> table below, then pay with a Stripe Shared Payment Token or send the buyer
> the response’s `continue_url`. Credential steps: https://www.gomry.com/auth.md

- **Event id**: `raxvHxYzP7wzmyrnZxcN`
- **Starts**: 2027-04-17T17:00:00.000Z (Etc/GMT+4)
- **Ends**: 2027-04-17T20:00:00.000Z (Etc/GMT+4)
- **Where**: Lexington Opera House, US
- **Organizer**: Gomry Retail
- **Availability**: `on_sale`
- **Price**: 134.25–251.18 usd
- **Page**: https://www.gomry.com/fr/event/Hadestown-raxvHxYzP7wzmyrnZxcN?utm_medium=web&utm_campaign=catalogApi

## About

Blending the ancient Greek myths of Orpheus and Eurydice with Hades and Persephone, Hadestown comes to the Lexington Opera House on April 17, 2027. This sung-through musical production explores enduring themes such as poverty through its music, lyrics, and book.

## Ticket types

| ticket type id | name | kind | price | currency | buyable now | per order | approval | sales end |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| `external:ticketnetwork%3A1292997745` | Gallery Right Center · E | ticket | 134.25 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242703675` | Gallery Left Center · G | ticket | 135.40 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1243070567` | Gallery Left Center · F | ticket | 135.40 | usd | yes | 1–11 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1293496751` | Gallery Right Center · G | ticket | 135.40 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242806068` | Gallery Left Center · E | ticket | 137.70 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1292997023` | Gallery Right Center · F | ticket | 137.70 | usd | yes | 1–7 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242703638` | Mezzanine Left · E | ticket | 167.60 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1244625595` | Gallery Left · B | ticket | 167.60 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242806370` | Gallery Left · A | ticket | 168.75 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242532173` | Mezzanine Right · E | ticket | 169.90 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242703649` | Gallery Right · B | ticket | 169.90 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242806366` | Mezzanine Right Center · J | ticket | 169.90 | usd | yes | 1–10 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1243552412` | Gallery Right Center · B | ticket | 171.05 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242806065` | Mezzanine Right Center · H | ticket | 199.80 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1278215319` | Mezzanine Left · C | ticket | 199.80 | usd | yes | 1–7 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242282040` | Mezzanine Right Center · G | ticket | 202.10 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242299722` | Mezzanine Right Center · F | ticket | 202.10 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1243551266` | Mezzanine Right · D | ticket | 202.10 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1282658612` | Mezzanine Left · D | ticket | 202.10 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1283367584` | Mezzanine Left Center · G | ticket | 202.10 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1286494369` | Mezzanine Left Center · H | ticket | 202.10 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1242806058` | Mezzanine Right · C | ticket | 203.25 | usd | yes | 1–7 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1283367573` | Mezzanine Left Center · F | ticket | 203.25 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1275520455` | Pit Left · AA | ticket | 234.30 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1275663036` | Pit Right · BB | ticket | 234.30 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1278585855` | Mezzanine Right Center · E | ticket | 234.30 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1283810141` | Mezzanine Left Center · C | ticket | 234.30 | usd | yes | 1–8 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1283810145` | Mezzanine Right Center · D | ticket | 234.30 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1288464009` | Orchestra Right Center · E | ticket | 234.30 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1288792640` | Mezzanine Left Center · E | ticket | 234.30 | usd | yes | 1–12 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1338102419` | Orchestra Right Center · H | ticket | 234.30 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1275494759` | Pit Right · AA | ticket | 236.60 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1338104348` | Orchestra Right Center · O | ticket | 236.60 | usd | yes | 1–8 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1338472419` | Orchestra Left Center · J | ticket | 236.60 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1275494758` | Pit Left Center · CC | ticket | 237.75 | usd | yes | 1–7 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1275663038` | Orchestra Right Center · C | ticket | 237.75 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1283552989` | Mezzanine Left Center · D | ticket | 237.75 | usd | yes | 1–10 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1338427870` | Orchestra Left Center · N | ticket | 237.75 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1339130376` | Orchestra Right Center · N | ticket | 237.75 | usd | yes | 1–7 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1339133266` | Orchestra Right Center · L | ticket | 237.75 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1337655874` | Orchestra Right Center · K | ticket | 240.05 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1337658488` | Orchestra Right Center · F | ticket | 240.05 | usd | yes | 1–5 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1338469943` | Orchestra Left Center · O | ticket | 240.05 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1348070489` | Orchestra Right Center · G | ticket | 240.05 | usd | yes | 1–6 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1397699333` | Orchestra Left · C | ticket | 244.34 | usd | yes | 1–3 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1397842900` | Orchestra Right · G | ticket | 244.34 | usd | yes | 1–3 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1397391377` | Orchestra Left Center · M | ticket | 251.18 | usd | yes | 1–1 | no | 2027-04-16T05:00:00.000Z |
| `external:ticketnetwork%3A1398065222` | Orchestra Right Center · M | ticket | 251.18 | usd | yes | 1–1 | no | 2027-04-16T05:00:00.000Z |

Prices exclude the service fee. `buyable now` is a boolean, not a count —
remaining stock is the organizer's information and is not published; create
a checkout session to find out whether a given quantity fits.

## Buying this for a person

Two ways, depending on what you can do:

- You can pay with a Stripe Shared Payment Token: buy it yourself through the
  API (see "Buying this through the API" below, when this event has it).
- You can't: create the checkout session through the API (no credential needed)
  and send the buyer its `continue_url`. They pay there with a card, Apple Pay or
  Google Pay and no Gomry account.
  Or send the buyer the link for the ticket they want below. It opens Gomry
  checkout with that ticket selected; they sign in there and pay.

- Gallery Right Center · E (134.25 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1292997745
- Gallery Left Center · G (135.40 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242703675
- Gallery Left Center · F (135.40 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1243070567
- Gallery Right Center · G (135.40 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1293496751
- Gallery Left Center · E (137.70 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242806068
- Gallery Right Center · F (137.70 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1292997023
- Mezzanine Left · E (167.60 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242703638
- Gallery Left · B (167.60 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1244625595
- Gallery Left · A (168.75 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242806370
- Mezzanine Right · E (169.90 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242532173
- Gallery Right · B (169.90 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242703649
- Mezzanine Right Center · J (169.90 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242806366
- Gallery Right Center · B (171.05 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1243552412
- Mezzanine Right Center · H (199.80 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242806065
- Mezzanine Left · C (199.80 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1278215319
- Mezzanine Right Center · G (202.10 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242282040
- Mezzanine Right Center · F (202.10 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242299722
- Mezzanine Right · D (202.10 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1243551266
- Mezzanine Left · D (202.10 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1282658612
- Mezzanine Left Center · G (202.10 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1283367584
- Mezzanine Left Center · H (202.10 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1286494369
- Mezzanine Right · C (203.25 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1242806058
- Mezzanine Left Center · F (203.25 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1283367573
- Pit Left · AA (234.30 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1275520455
- Pit Right · BB (234.30 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1275663036
- Mezzanine Right Center · E (234.30 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1278585855
- Mezzanine Left Center · C (234.30 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1283810141
- Mezzanine Right Center · D (234.30 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1283810145
- Orchestra Right Center · E (234.30 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1288464009
- Mezzanine Left Center · E (234.30 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1288792640
- Orchestra Right Center · H (234.30 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1338102419
- Pit Right · AA (236.60 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1275494759
- Orchestra Right Center · O (236.60 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1338104348
- Orchestra Left Center · J (236.60 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1338472419
- Pit Left Center · CC (237.75 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1275494758
- Orchestra Right Center · C (237.75 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1275663038
- Mezzanine Left Center · D (237.75 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1283552989
- Orchestra Left Center · N (237.75 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1338427870
- Orchestra Right Center · N (237.75 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1339130376
- Orchestra Right Center · L (237.75 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1339133266
- Orchestra Right Center · K (240.05 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1337655874
- Orchestra Right Center · F (240.05 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1337658488
- Orchestra Left Center · O (240.05 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1338469943
- Orchestra Right Center · G (240.05 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1348070489
- Orchestra Left · C (244.34 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1397699333
- Orchestra Right · G (244.34 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1397842900
- Orchestra Left Center · M (251.18 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1397391377
- Orchestra Right Center · M (251.18 USD): https://www.gomry.com/event/Hadestown-raxvHxYzP7wzmyrnZxcN/getTickets?utm_medium=web&utm_campaign=catalogApi&ticket_type=external%3Aticketnetwork%253A1398065222

## Buying this through the API, end to end

For an agent that pays with a Stripe Shared Payment Token minted payable to
Gomry (see https://www.gomry.com/auth.md#payment). The purchase finishes without the
buyer leaving your conversation.

No token? Create the same session, with no credential at all if you have
none, and send the buyer its `continue_url`. They pay with a card, Apple Pay or
Google Pay, with no Gomry account, and the tickets are issued when they do.

The `ticket type id` column above is `items[].id` below. This body is
complete and can be sent as it stands, with the buyer details replaced:

```
POST https://www.gomry.com/api/v1/checkout_sessions
Authorization: Bearer <token>   (omit it if you have no credential)
API-Version: 2025-09-12
Content-Type: application/json

{
  "items": [
    {
      "id": "external:ticketnetwork%3A1292997745",
      "quantity": 1
    }
  ],
  "buyer": {
    "name": "Ada Lovelace",
    "email": "ada@example.com"
  }
}
```

The response `totals` is the authoritative price — it includes the service
fee, which is not in the table above and depends on the cart and the
organizer's fee settings. Never compute a total from this document.

Quoting and `continue_url` need no credential. Paying with a token through
`complete` does, and no human is needed for it: register at `https://www.gomry.com/api/mcp/oauth/register`
for the `client_credentials` grant. Full flow: https://www.gomry.com/auth.md