Read and write user password hash via rest api

How to read the user password hash via the UDM REST API?
Reading the user object via UDM Rest API in module “users/user” there is always

...
"password": null
...

as result (all other attributes are okay). The same with module “users/passwd”.

And in case it is possible to get the user password hash, how to write it as user password for an user in an other UCS via UDM Rest API?
There is only the possibility to do set it as clear text password in the password attribute.