How to get the session
Call login to get, get the session through the return value
Session permission description
Have account role permissions
Authorized account corresponding to authorized vehicle permissions
For 4 hours.
Failure to call for more than 4 hours will cause jsession to fail
If there are continuous interface calls, jsession will always be valid.
The second login of the same account will not cause the jsession generated by the first login to become invalid;