@Override
    public Object getResource() throws GuacamoleException {
        return null;
    }
Creates a new SimpleUserContext for the user with the given username
which provides access to only those configurations within the given Map.
Parameter tokens within the given GuacamoleConfigurations will be
interpreted if explicitly requested.

@param authProvider
    The AuthenticationProvider creating this UserContext.

@param username
    The username of the user associated with this UserContext.

@param configs
    A Map of all configurations for which the user associated with
    this UserContext has read access.

@param interpretTokens
    Whether parameter tokens in the underlying GuacamoleConfigurations
    should be automatically applied upon connecting. If false, parameter
    tokens will not be interpreted at all.
guacamole-ext/src/main/java/org/apache/guacamole/net/auth/simple/SimpleUserContext.java