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## 5.27.1

**`(fix):`** Accept a plain string for the root client's `token` parameter when OAuth client credentials
are configured with a token override. The constructor overload, implementation signature, and
docstring previously typed `token` as `typing.Callable[[], str]` only, even though the client
wrapper accepts `typing.Union[str, typing.Callable[[], str]]` at runtime and the generated
example passes a string literal, so type checkers rejected the documented usage.