Worked on the ClickHouse/terraform-provider-clickhouse repository to enhance infrastructure security by implementing a write-only password attribute for the Clickhouse service. This feature, developed using Go and Terraform, prevents sensitive passwords from being stored in Terraform state files, thereby reducing credential exposure risks in infrastructure-as-code workflows. The work involved updating the service schema, model, and validation logic to support the new password_wo attribute, ensuring compliance with security best practices. Focused on backend and API development, the changes enable more secure secret handling for users managing Clickhouse services through Terraform, with all updates documented and integrated into the existing codebase during the month.