Getting access token for uploads in v4

Imagery, data, and integrations Mapillary integrations
4

Seeing the same thing as everyone else. The documentation says contradicting things like /connect vs /authorize. No details on what needs to be sent to /token, and I get an unhelpful error that I can’t lookup anywhere:

{
  "error": {
    "message": "Invalid OAuth 2.0 Access Token",
    "type": "MLYApiException",
    "code": 190,
    "error_data": {},
    "fbtrace_id": "A9-7asFpQ0nlkaMYtAn-YNE"
  }
}

When I tried the following:

const authResponse = await fetch(`https://graph.mapillary.com/token`, {
      method: 'POST',
      body: JSON.stringify({
        code: req.query.code,
        client_secret: '..',
        access_token: 'MLY|...|...',
      }),
    });