# Functions
NewCAService returns new instance of CAService.
NewIdentityService returns a new instance of IdentityService object.
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NewPresenceService returns new presence service instance.
NewProvisioningService returns a new instance of provisioning service.
# Structs
CA is local implementation of Trust service that is using local backend.
IdentityService is responsible for managing web users and currently user accounts as well.
Lock is lock service using local lock backend.
PresenceService records and reports the presence of all components of the cluster - Nodes, Proxies and SSH nodes.
ProvisioningService governs adding new nodes to the cluster.