* Move keys to models/keys
* Rename models/keys -> models/asymkey
* change the missed package name
* Fix package alias
* Fix test
* Fix docs
* Fix test
* Fix test
* merge
* Some refactors related repository model
* Move more methods out of repository
* Move repository into models/repo
* Fix test
* Fix test
* some improvements
* Remove unnecessary function
* Remove unnecessary functions of User struct
* Move more database methods out of user struct
* Move more database methods out of user struct
* Fix template failure
* Fix bug
* Remove finished FIXME
* remove unnecessary code
* Use a standalone struct name for Organization
* recover unnecessary change
* make the code readable
* Fix template failure
* Fix template failure
* Move HasMemberWithUserID to org
* Fix test
* Remove unnecessary user type check
* Fix test
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>