Access token for API requests
OptionalclientClient ID used for DCR registration (stored for future use)
OptionalclientClient secret used for DCR registration (stored for future use)
Timestamp when access token expires (milliseconds since epoch)
OptionalissuerIssuer identifier of the authorization server these credentials belong to (SEP-2352)
Refresh token for obtaining new access tokens
OptionalscopesScopes granted for this token set
OAuth token set with access and refresh tokens