public Collection<String> getAttributesClaimType() throws GuacamoleException {
        return environment.getPropertyCollection(OPENID_ATTRIBUTES_CLAIM_TYPE, DEFAULT_ATTRIBUTES_CLAIM_TYPE);
    }
Returns the claims list within any valid JWT that should be mapped to
the authenticated user's tokens, as configured with guacamole.properties.
Empty by default.

@return
    The claims list within any valid JWT that should be mapped to
    the authenticated user's tokens, as configured with guacamole.properties.

@throws GuacamoleException
    If guacamole.properties cannot be parsed.
extensions/guacamole-auth-sso/modules/guacamole-auth-sso-openid/src/main/java/org/apache/guacamole/auth/openid/conf/ConfigurationService.java