func (l *lockRESTServer) RefreshHandler(args *dsync.LockArgs) (*dsync.LockResp, *grid.RemoteErr) {
	resp := lockRPCRefresh.NewResponse()
	refreshed, err := l.ll.Refresh(context.Background(), *args)
	if err != nil {
		return l.makeResp(resp, err)
	}
	if !refreshed {
		return l.makeResp(resp, errLockNotFound)
	}
	return l.makeResp(resp, err)
}

// LockHandler - Acquires a lock.

  repeated APIResourceDiscovery resources = 2;

  // freshness marks whether a group version's discovery document is up to date.
  // "Current" indicates the discovery document was recently
  // refreshed. "Stale" indicates the discovery document could not
  // be retrieved and the returned discovery document may be
  // significantly out of date. Clients that require the latest

	lockNotFound bool

	// Set to true if you want peers servers to do not respond
	responseDelay int64
}

func (l *lockServer) setRefreshReply(refreshed bool) {
	l.mutex.Lock()
	defer l.mutex.Unlock()
	l.lockNotFound = !refreshed
}

func (l *lockServer) setResponseDelay(responseDelay time.Duration) {
	atomic.StoreInt64(&l.responseDelay, int64(responseDelay))
}

	return restClient.Call("/v1/unlock", args)
}

func (restClient *ReconnectRESTClient) Refresh(ctx context.Context, args LockArgs) (refreshed bool, err error) {
	return restClient.Call("/v1/refresh", args)
}

func (restClient *ReconnectRESTClient) ForceUnlock(ctx context.Context, args LockArgs) (reply bool, err error) {

type KeycloakProvider struct {
	sync.Mutex

	oeConfig DiscoveryDoc
	client   http.Client
	adminURL string
	realm    string

	// internal value refreshed
	accessToken Token
}

// LoginWithUser authenticates username/password, not needed for Keycloak
func (k *KeycloakProvider) LoginWithUser(username, password string) error {
	return ErrNotImplemented
}

						console.Debugln("returning", m.id, "due to scan state", m2.status, time.Now().Format(time.RFC3339))
					}
					return
				}
				m = m2
				if serverDebugLog {
					console.Debugln("refreshed", m.id, time.Now().Format(time.RFC3339))
				}
			} else if serverDebugLog {
				console.Debugln("error refreshing", m.id, time.Now().Format(time.RFC3339))
			}
		}
	}
}

	}

	mclaims := jwtgo.MapClaims(claims)
	jwtToken, err := jp.ParseWithClaims(token, &mclaims, keyFuncCallback)
	if err != nil {
		// Re-populate the public key in-case the JWKS
		// pubkeys are refreshed
		if err = r.PopulatePublicKey(arn); err != nil {
			return err
		}
		jwtToken, err = jwtgo.ParseWithClaims(token, &mclaims, keyFuncCallback)
		if err != nil {
			return err
		}
	}

8. Notice that this *path operation function* uses regular `def` instead of `async def`.

    As always, in FastAPI you can combine `def` and `async def` as needed.

    If you need a refresher about when to use which, check out the section _"In a hurry?"_ in the docs about [`async` and `await`](../async.md#in-a-hurry){.internal-link target=_blank}.

### Just Modern Python

It's all based on standard **Python type** declarations (thanks to Pydantic). No new syntax to learn. Just standard modern Python.

If you need a 2 minute refresher of how to use Python types (even if you don't use FastAPI), check the short tutorial: [Python Types](python-types.md){.internal-link target=_blank}.

You write standard Python with types:

```Python
from datetime import date