Document `Secret` type in Python API docs (#1724)
* Document Secret type in Python API docs
Signed-off-by: Mattt Zmuda <mattt@replicate.com>
* Add warning about passing sensitive information to untrusted models
Signed-off-by: Mattt Zmuda <mattt@replicate.com>
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Signed-off-by: Mattt Zmuda <mattt@replicate.com>