Jenn Miller developed external OAuth authentication support for BigQuery in the dbt-labs/dbt-adapters repository, enabling secure connections through GCP Workload Identity Federation and Entra ID. She introduced a new connection method, external-oauth-wif, and implemented the token acquisition and credential creation flow to facilitate flexible authentication using external identities. Her work leveraged Python and YAML, integrating cloud computing and authentication best practices to align with project security standards. By focusing on robust credential management and seamless integration with GCP and Entra ID, Jenn addressed the need for secure, scalable authentication options, demonstrating depth in both cloud infrastructure and DevOps workflows.