This class encapsulates all operations done by clients on a user’s private keys. In practice, the client should never need a reference to a private key; instead, they grab a list of "identities" (public keys) that are available from the UserKeyManager, and then use the UserKeyManager to do various private key operations using those identities.
The UserKeyManager also uses the Agent class to encapsulate the ssh-agent. Thus, from a client’s perspective it is completely hidden whether an identity comes from the ssh-agent or from a file on disk.
Methods