callable DRF_RECAPTCHA_SECRET_KEY with context

[daadu]

Making settings.DRF_RECAPTCHA_SECRET_KEY callable with context from Serializer.

This could be useful when project has multiple keys (1 for android and 1 for web) and want to verify recaptacha the request based on some condition.

[daadu]

Let me know if this feature is ok to go with, will do the necessary doc changes.

[llybin]

Hi, thanks. I started to do it, but there is no time now sorry, I do not remember where I stuck. I'll have free time near New Year. Or maybe you can help to finish my branch? https://github.com/llybin/drf-recaptcha/tree/feet/dynamic_secretkey

[daadu]

Will take a look at it. Although, for my project I created new ReCaptchaV2Validator that sets the key required before running validation.