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usage2 returns the character usage and the configured limit for the current period of a DeepL API Free account.
usage2
usage2(auth_key = "your_key")
authentication key.
To get an authentication key, you need to register for a DeepL API Pro account (https://www.deepl.com/pro#developer).
DeepL API documentations
if (FALSE) { usage(auth_key = "my_key") }
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