# Source code for azure.core.credentials

    # -------------------------------------------------------------------------
    # Copyright (c) Microsoft Corporation. All rights reserved.
    # Licensed under the MIT License. See LICENSE.txt in the project root for
    # license information.
    # -------------------------------------------------------------------------
    from typing import TYPE_CHECKING

    if TYPE_CHECKING:
        from typing import Any, NamedTuple
        from typing_extensions import Protocol

        AccessToken = NamedTuple("AccessToken", [("token", str), ("expires_on", int)])

        class TokenCredential(Protocol):
            """Protocol for classes able to provide OAuth tokens.

            :param str scopes: Lets you specify the type of access needed.
            """

            # pylint:disable=too-few-public-methods
            def get_token(self, *scopes, **kwargs):
                # type: (*str, **Any) -> AccessToken
                pass

    else:
        from collections import namedtuple

        AccessToken = namedtuple("AccessToken", ["token", "expires_on"])