Major Description
Similar to a kerberos kinit, we need a CLI command to authenticate to a KnoxToken service and request a token for an SSO session across API interactions.
The CLI should include parameters for cluster/topology-name and potentially a list of services required. A combination of KnoxToken service config and these parameters will determine: 1. whether the token can be acquired and 2. the audience claims added to the token for access decisions when accessing services using it as a bearer token.