Q:

Get all users filtering by custom property using sharepoint search api

I need get all users with a custom property using sharepoint search api, this custom property already mapped in sharepoint.
I'm using this url, and this retrieves all users
http://localsite/_api/search/query?querytext='*'&sourceid='B09A7990-05EA-4AF9-81EF-EDFAB16C4E31'&rowlimit=5&selectproperties='PreferredName,WorkEmail,PictureUrl,Title,Departament,Birthday,Url'

But i need get all users with filtering by custom property Birthday, example, Sep/1 to Sep/31
How should I do

A:

For a specific date:
&refinementfilters='Birthday:datetime("2000-06-25")'

For a range (a month in this example)
&refinementfilters='Birthday:range(datetime("2000-06-01"), datetime("2000-06-30"))'

