private List<String> getRolesFromString(String rolesString) {
        if (rolesDelimiter == null) {
            return List.of(rolesString);
        }
        return Arrays.stream(rolesString.split(rolesDelimiter))
                .filter(s -> !s.isBlank())
                .toList();
    }
The path to the claim to extract user display name
server/src/main/java/com/epam/aidial/core/server/security/IdentityProvider.java