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Description: The registration page at https://www.alwaysdata.com/en/register/ requires mandatory credit card validation ("Validation par carte bancaire") to proceed, as noted in the warning: "Pour continuer l'inscription et afin de limiter les abus vous devez impérativement valider une carte bancaire." This is likely an abuse prevention measure.

However, the Google OAuth flow at https://www.alwaysdata.com/oauth/google/login/ allows bypassing this requirement. By signing in with a Google account and completing the CAPTCHA, I created a new account without providing or validating a credit card.

Steps to Reproduce: 1. Visit https://www.alwaysdata.com/en/register/.
2. Observe the mandatory credit card validation step ("Valider ma carte" button).
3. Navigate to https://www.alwaysdata.com/oauth/google/login/.
4. Sign in with a Google account .
5. Confirm the creation of a new account without credit card validation.

Impact: - This allows bypassing the intended abuse prevention mechanism, potentially enabling multiple free account creations without validation.
- The impact is limited to potential resource consumption (e.g., bandwidth, storage) if scaled, with no access to customer data or core platform architecture.