# Reconnecting to Snowflake OAuth after authentication expires

When you connect Snowflake to dbt platform using [OAuth](../../docs/platform/manage-access/set-up-snowflake-oauth.md), dbt stores a refresh token. This allows your user credentials to be reused in tools like the Studio IDE and the dbt Semantic Layer without needing to re-authenticate each time.

If you see an `authentication has expired` error when you try to run queries, you must renew your connection between Snowflake and the dbt platform.

To resolve the issue, complete the following steps:

1. Go to **Your profile**, accessible from the navigation menu.
2. Navigate to **Credentials** and then choose the project where you're experiencing the issue.
3. Under **User credentials**, click the **Reconnect Snowflake Account** button. This will guide you through re-authenticating using your SSO workflow.

Your Snowflake administrator can [configure the refresh token validity period](../../docs/platform/manage-access/set-up-snowflake-oauth.md#create-a-security-integration), up to the maximum 90 days.

If you've tried these step and are still getting this error, please contact the Support team at <support@getdbt.com> for further assistance.

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