model_endpoint does not get set when OPENAI_API_BASE is set and openai is the backend

[kfsone]

memgpt/cli/cli_config.py

        default_model_endpoint = os.getenv("OPENAI_API_BASE")
        # if OPENAI_API_BASE is not set, try to pull a default IP+port format from a hardcoded set
        if default_model_endpoint is None:
            if model_endpoint_type in DEFAULT_ENDPOINTS:
                default_model_endpoint = DEFAULT_ENDPOINTS[model_endpoint_type]
                model_endpoint = questionary.text("Enter default endpoint:", default=default_model_endpoint).ask()
            else:
                # default_model_endpoint = None
                model_endpoint = None
                while not model_endpoint:
                    model_endpoint = questionary.text("Enter default endpoint:").ask()
                    if "http://" not in model_endpoint and "https://" not in model_endpoint:
                        typer.secho(f"Endpoint must be a valid address", fg=typer.colors.YELLOW)
                        model_endpoint = None
        assert model_endpoint, f"Environment variable OPENAI_API_BASE must be set."

so model_endpoint doesn't get set

[cpacker]

Thank you for catching this! PR merged