1. Fix bug: Pointer is not assigned, resulting in crash
2. The show accounts command supports the use of non root accounts.
3. Fix bug: After the two servers cluster and the masterip machine goes down, no heartbeat causes the power or Taos connection to fail
4. Fix bug: When the client specifies a database login that does not exist, it causes taosd crash.
5. Fix bug: Synchronization failed when taosd start.
6. Fix code issues reported by coverage scan