To get the trials made  users :


Get YOUR_API_KEY ( How to ? ) 


created_on this is the registered date time (UTC) of the user
updated_on verified user is unique , to avoid duplication we update the date time to  updated_on field on each verification
mobile Verified Mobile number of the OTP APP user ( eg : +918111903111 ) 
app_id Application's Unique ID that you have created.