Async methods as Callable arguments, are not supported.

[IPENprj]

Describe the bug Limiter.limit: Callable params (e.g: exempt_when) won't affect if are Async.

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Expected behavior A clear and concise description of what you expected to happen.

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Your app (please complete the following information):

• fastapi or starlette?
• Version?
• slowapi version (have you tried with the latest version)?

Additional context Add any other context about the problem here.