Hi Iqbal,
Mendix System module security means that the password field is never directly writable by a user on the front end. That password can only be set by the system. To facilitate someone creating a password, consider using a non-persistent entity with a ‘password’ and ‘re-enter password’ field that is then compared and set to be the password of the system module using a microflow.
Check out how the ‘change password’ and ‘new account’ workflows work in the Administration module in the app store for an example of exactly how this can work:
https://appstore.home.mendix.com/link/app/23513/Mendix/Administration-module