code: def change_password(ctx):
      
  
      username, passhash = _get_credentials(ctx.obj['username'],
                                            ctx.obj['password'],
                                            ctx.obj['db'])
  
      change_user = ctx.obj['db'].objectmodels['user'].find_one({
          'name': username
      })
      if change_user is None:
          log('No such user', lvl=warn)
          return
  
      change_user.passhash = passhash
      change_user.save()
  
      log("Done")
docs: Change password of an existing user