GET user access token via api

Hi guys,
I was trying to get the access-token for the client that i created via the provided in this link:

The error i got was:

    "error": "RESTEASY003210: Could not find resource for full path:"

The body params are:
“client_secret”: “secret”
Also i am using keycloak 17 on as my local server. i was not able to find any api that fetches access-token in the keycloak 17 doc provided the required parameters . I am running the server in its default port 8080. is there any such api that can retrive the particular user’s access-token?

Please help me out.