Thanks @SASKiwi
Its issue with only new user. Access team provided all the required access and in metadata. when user type user id and password its throwing error "Login Credential invalid". we are using WebSphere middlewere. We have metadata log its showing below msg
"New client connection (57xx) accepted from server port 8561 for SAS token user newuser".
What is next step to debugging ? where we look for error at app and web server?