This action lets you use a long‑lived login token to obtain a short‑lived access token, which you can then use to access other resources. The access token is a JWT that you can inspect to verify its permissions and validity.For access tokens, the validity is limited to 5 minutes.In addition to standard claims, each token includes an exp claim that contains a NumericDate (a Unix timestamp in whole seconds, UTC, since 1970‑01‑01T00:00:00Z). The token is rejected once the current time is at or past exp. When it expires, you must acquire a new access token.At the same time, the permissions are stored in the scp claim.