Access tokens are not refreshed or updated in the database once they expire, resulting in failed meeting fetches and unauthorized API responses.

Access tokens are not fetched and set in database when they are expired.

#### **Steps to Reproduce**
1. Log in to **Lingo Bot** — access token is stored in the database.
2. Wait until the access token expires.
3. Attempt to fetch meetings using the expired access token.

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#### **Expected Behavior**
- The system should detect that the access token is expired.
- Automatically refresh the token using the refresh token.
- Save the new access token to the database.
- Retry the failed request (e.g., fetch meetings).

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#### **Actual Behavior**
- API calls (e.g., fetch meetings) fail with `Unauthorized` or `undefined` responses.
- The system does **not** refresh the token.
- The **expired access token remains** in the database.
- No new meeting data is fetched or stored.

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