From Tomas Kyjovsky:

5.1.
para 2: instance is then garbage collections --> instance is then garbage collected

5.2.
para 1: capabilityinterfaces --> capability interfaces
table row 2: view and manager users --> view and manage users

5.3.
There are other model classes within the org.keycloak.models package the represent ---> that represent

5.3.1.
One really import method --> important method
para2: lookup users --> look up users / look users up (one of these but not 100% sure which one)

5.4.
directory if the server --> directory of the server
list of fully qualified classnames of use UserStorageProviderFactory implementation. ---> list of fully qualified classnames of UserStorageProviderFactory implementations.

5.5.
The provider will be able to lookup the user by id --> look the user up by id
read only --> read-only

5.5.1.
because was want to post an error condition when the user’s password is attempted to be updated. ---> because we want to post an error condition when a user's password update is attempted.

5.5.1.1.
Emails are not stored at all, so the getUserByEmail() method returns null.