is there any way to restrict users from accessing playground without authentication. I have added PRISMA_MANAGEMENT_API_SECRET and it works fine when I am trying to access prisma service from CLI however I can still access playground from prisma end point

You can set the

secret

in prisma.yml: https://www.prisma.io/docs/prisma-graphql-api/reference/authentication-ghd4/

To be clear, people will see the playground even with the secret set, but won't be able to query anything, not even the schema, if they don't provide a valid token.