The validity of an OAuth token for a particular service connection is determined by the system that issues the token. In the case of JWT tokens, the expiry date and time are encoded within the token itself. Regardless of the token type and issuing system, Oracle Cloud Applications (service) infrastructure ensures that the token is reissued when the current one expires, provided the user is still logged into Oracle Cloud Applications and the calling REST API complies with the OAuth specification. If the user is no longer logged into Oracle Cloud Applications, any attempts to issue a new token will redirect the user to the login page.