Pbkdf2.Base.verify_pass

You're seeing just the function verify_pass, go back to Pbkdf2.Base module for more information.
Link to this function

verify_pass(password, hash, salt, digest, rounds, output_fmt)

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Specs

verify_pass(binary(), binary(), binary(), atom(), binary(), atom()) :: boolean()

Verify a password by comparing it with the stored Pbkdf2 hash.