Specify audience in Oauth 2.0 Client Credentials flow

Hi, I'm trying to test the built in securityIn with client credentials flow but getting an error because I haven't specified an audience on this server I set up in auth0.

  val oauthToken = apiEndpoint
    .in("oauth" / "client")
    .securityIn(auth.oauth2.clientCredentialsFlow("https://<omitted>.us.auth0.com/oauth/token"))
    .out(stringBody)

curL created by Tapir/Swagger

curl 'https://<omitted>.us.auth0.com/oauth/token' \
  -H 'accept: application/json, text/plain, */*' \
  -H 'accept-language: en-US,en;q=0.9' \
  -H 'authorization: Basic <omitted>' \
  -H 'content-type: application/x-www-form-urlencoded' \
  -H 'dnt: 1' \
  -H 'origin: http://localhost:8083' \
  -H 'priority: u=1, i' \
  -H 'referer: http://localhost:8083/' \
  -H 'sec-ch-ua: "Chromium";v="137", "Not/A)Brand";v="24"' \
  -H 'sec-ch-ua-mobile: ?0' \
  -H 'sec-ch-ua-platform: "macOS"' \
  -H 'sec-fetch-dest: empty' \
  -H 'sec-fetch-mode: cors' \
  -H 'sec-fetch-site: cross-site' \
  -H 'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36' \
  -H 'x-requested-with: XMLHttpRequest' \
  --data-raw 'grant_type=client_credentials'

Auth0's sample request on how they want it to look like.

curl --request POST \
  --url https://<omitted>.us.auth0.com/oauth/token \
  --header 'content-type: application/json' \
  --data '{
    "client_id":"<omitted>",
    "client_secret":".<omitted>",
    "audience":"https:/<omitted>.us.auth0.com/api/v2/",
    "grant_type":"client_credentials"
  }'

Right now I'm getting this error in my Swagger:

EDIT: I can get around this by specifying a default audience in Auth0 but this question is still relevant.

Start at the securityIn call using oauth2.clientCredentialsFlow and compare its generated request with the Auth0 sample in the issue. Determine how an audience can be supplied for the client-credentials flow, then verify that the generated request includes it and that existing usage remains supported.