The version of recaptcha API to use.
The v2 captcha type to use (if any).
The language (if any) to use if browser doesn't support any languages supported by reCAPTCHA.
The application's recaptcha private key.
The application's recaptcha public key.
The millisecond request timeout duration, when connecting to the recaptcha web API.
The v2 captcha type to use (if any).
The theme for the recaptcha widget to use (if any).
Whether to use the secure (SSL) URL to access the verify API.
Whether to use the secure (SSL) URL to render the reCAPCTHA widget.
Defines the configuration keys used by the module.