Get invalidation timestamp of the access token.
Access token.
Invalidation timestamp or undefined if accessToken
was not present in the cache.
Check for access token existence in the cache.
If found, it means access token is no longer valid.
Access token.
Upset access token.
Access token that's no longer valid.
Invalidation timestamp.
How many seconds invalid access token should be kept in the cache.
In-memory cache where invalid access tokens are stored.