Captcha support on SignUp method

[retr0grde]

Feature request

Is your feature request related to a problem? Please describe.

I am developing a custom Sign Up flow for my frontend app that calls backend API to sign up user. At a certain point I call SignUp method from Supabase NuGet package. This works just fine when Captcha is not configured, but when I try to run it with Captcha enabled I get following error:

Supabase.Gotrue.Exceptions.GotrueException: {"code":500,"error_code":"unexpected_failure","msg":"captcha verification process failed","error_id":"99426df994c4441d-WAW"}
   at Supabase.Gotrue.Helpers.MakeRequest(HttpMethod method, String url, Object data, Dictionary`2 headers)
   at Supabase.Gotrue.Api.SignUpWithEmail(String email, String password, SignUpOptions options)
   at Supabase.Gotrue.Client.SignUp(SignUpType type, String identifier, String password, SignUpOptions options)
   at App.Services.SupabaseProviderService.CreateUser(String email, String password, Guid internalUserId, String captchaToken, CancellationToken cancellationToken)

I don't see any option of setting captchaToken like you can with the frontend library described here: Enable CAPTCHA Protection

Describe the solution you'd like

SignUp method to accept captcha tokens, just like the frontend library does.

Describe alternatives you've considered

I tried calling providing captcha as header Supabase APIs directly, but this completely defeats the purpose of using this package.

Additional context