Create a new identity-repository. Pass in a hashmap containing the functions to execute as values. These functions will be called by the internal ssh engine. The hashmap should contain some subset of the the following keywords:

:get-name (fn [] ...)

return a string specifying the name of this repository

:get-status (fn [] ...)

return the present status of this repository. Can be :unavailable, :not-running or :running

:get-identities (fn [] ...)

return a sequence of the identities stored in this repository

:add (fn [^bytes identity-data] ...)

add the passed in raw data as an identity

:remove (fn [^bytes identity-data] ...)

remove the passed in raw data identity from the repository.

:removeAll (fn [] ...)

empty the repository