Use REST Client to test
POST https://openid.hydra:9001/oauth2/token
Authorization: Basic YXV0aC1jb2RlLWNsaWVudDpzZWNyZXQ=
Content-Type: application/x-www-form-urlencoded
grant_type=authorization_code
&code=cuNw76aEuckIJJyVssk2LJvqdLXffT-8Kx1s0tYFt6Y.v0Dxc2_yT9ga8c2moKx0fDbwRFVgwryAt5BJM7lOJlM
#&redirect_uri=https://certfront/oid/test/callback
#&scope=openid,offline
#&client_id=auth-code-client
#&code_verifier=
#&state=gczxkznmjkrksgytsemvwgkf
Import is： Authorization: Basic
https://github.com/ory/hydra/issues/631
Not Authorization: Bearer
base64(urlencode(client_id):urlencode(client_secret))
YXV0aC1jb2RlLWNsaWVudDpzZWNyZXQ= => auth-code-client:secret
code is callback code. When you login-consent finish step then callback to your set callback URL. Watch URL inside have code=
example: https://t.tt:9010/callback?code=cuNw76aEuckIJJyVssk2LJvqdLXffT-8Kx1s0tYFt6Y.v0Dxc2_yT9ga8c2moKx0fDbwRFVgwryAt5BJM7lOJlM&scope=openid%20offline&state=gczxkznmjkrksgytsemvwgkf
If code have error message, you need check before any step have incorrect.
In Ory Hydra get access token is not like sdk document
https://www.ory.sh/docs/hydra/sdk/api#the-oauth-20-token-endpoint
You need to sure grant_type=authorization_code Not other options.
But SDK Document No any options example. Only suggestion you use lib. So you need to try many.
like follow
https://www.oauth.com/oauth2-servers/pkce/authorization-code-exchange/
https://community.ory.sh/t/how-configure-grant-implicit-flow/411/14
https://auth0.com/docs/api-auth/tutorials/authorization-code-grant-pkce
https://github.com/oauthjs/express-oauth-server/issues/55
https://www.jianshu.com/p/5cf2b7a45b75
http://www.passportjs.org/docs/oauth/
Then try out a ways.
OK. Mark is not important Required.
#&redirect_uri=https://certfront/oid/test/callback
#&scope=openid,offline
#&client_id=auth-code-client
#&code_verifier=
#&state=gczxkznmjkrksgytsemvwgkf