# Which Problems Are Solved
This PR adds the OTP SMS Challenge needed for CreateSession API
https://github.com/zitadel/zitadel/issues/11035
# How the Problems Are Solved
- Introduce `OTPSMSChallengeCommand` (validate/execute/events) for
session creation checks
- Introduce `GetOTPCryptoGeneratorConfigWithDefault` to fetch
per-instance secret generator settings
- Add unit tests
# Additional Changes
Refactor tests in `session_check_recovery_code_test.go` to make the
helper functions reusable in `session_challenge_otp_sms_test.go`
# Additional Context
Related to https://github.com/zitadel/zitadel/issues/11035
