Tokens for an app (RFC 6749 §5.1). Never cached.
access_tokenstringrequiredcat_live_…: send it as Authorization: Bearer. Lives an hour.
expires_inintegerrequiredSeconds the access token lives: 3600.
refresh_tokenstringrequiredcrt_live_…: the next refresh token. Store it before you use it: the one you sent no longer works, and sending it again revokes everything.
scopestringrequiredThe access token’s scopes, space-separated.
store_idstring (uuid) or nullrequired