Go to “Settings” > “Users“.
To change password, click Edit to enable the editing.
Provide User which password you want to change.
Provide the Current Password, New Password, Confirm Password.
Change will save the new password for the supplied user.
Only admin user can have this functionality available as a default. Admin user can reset others Users password. Click Edit will enable the editing.
Select User Name from the drop down list to reset the password.
Reset will reset and generate a new password and will be shown at Reset Password.
Write the new reset password and let user know to change the password at the very next login.
Video Tutorial: Reset, Change user password