fix: check if the token is valid

    def scan(self, sbom_patterns: list[str]):

        try:

            # try to join the api server

            self.get_permissions()

            # try to connect to Dependency Track server

            self.dt_version

        except requests.exceptions.RequestException as err:

            fail(

                f"Unable to connect to Dependency Track server - check the API URL and network configuration: {err}"

            )

        try:

            # try an authenticated request to Dependency Track server

            self.get_permissions()

        except requests.exceptions.RequestException as err:

            fail(

                f"Unable to authenticate to Dependency Track server - check the API key: {err}"

            )

        print(

            f"🗝 API key has permissions: {AnsiColors.BLUE}{', '.join(self.get_permissions())}{AnsiColors.RESET}"