public ModeledUser retrieveSkeletonUser(AuthenticationProvider authenticationProvider,
            AuthenticatedUser authenticatedUser) throws GuacamoleException {
        
        // Set up an empty user model
        ModeledUser user = getObjectInstance(null,
                new UserModel(authenticatedUser.getIdentifier()));
        
        // Create user object, and configure cyclic reference
        user.setCurrentUser(new ModeledAuthenticatedUser(authenticatedUser,
                authenticationProvider, user));
        
        // Return the new user.
        return user;
        
    }
Generates an empty (skeleton) user corresponding to the given
AuthenticatedUser.  The user will not be stored in the database, and
will only be available in-memory during the time the session is
active.

@param authenticationProvider
    The AuthenticationProvider on behalf of which the user is being
    retrieved.

@param authenticatedUser
    The AuthenticatedUser to generate the skeleton account for.

@return
    The empty ModeledUser which corresponds to the given
    AuthenticatedUser.

@throws GuacamoleException
    If a ModeledUser object for the user corresponding to the given
    AuthenticatedUser cannot be created.
extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/user/UserService.java