method name is misspelled

[wlclass]

Describe the bug
The name of this method is misspelled.
https://github.com/shubhamranjan/dotnet-etcd/blob/main/dotnet-etcd/authClient.cs#L321

To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Additional context
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[shubhamranjan]

Thanks for reporting. Will be fixed soon