codeant-ai-for-open-source[bot] commented on PR #38364:
URL: https://github.com/apache/superset/pull/38364#issuecomment-3992534096
## **Sequence Diagram**
Shows the core flow when the system refreshes an OAuth2 access token and
supports providers that return a single-use refresh token by replacing the
stored refresh token when present.
```mermaid
sequenceDiagram
participant Refresher
participant DBEngineSpec
participant Database
Refresher->>DBEngineSpec: Request fresh token using stored refresh_token
DBEngineSpec-->>Refresher: Return token_response (access_token,
expires_in[, refresh_token])
Refresher->>Refresher: Update access_token and expiration; if
refresh_token present replace stored refresh_token
Refresher->>Database: Persist updated token record
Refresher-->>Caller: Return new access_token
```
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