{"bsonType":"object","required":["_id","value"],"properties":{"_id":{"bsonType":"string","description":"key，格式：uni-id:[provider]:[appid]:[openid]:[access-token|user-access-token|session-key|encrypt-key-version|ticket]"},"value":{"bsonType":"object","description":"字段_id对应的值"},"expired":{"bsonType":"timestamp","description":"过期时间"}},"version":"0.0.1"}