User Create Date Unavailable?

[kevinkutner]

I was trying to create a segment of our leads that were less than 6 months old when I realized I could not find a create date field anywhere. 

Does this simply not exist in Braze? When I do .csv exports I am able to see a field called

lead_date_created

 as well as 

created_at

but I am not able to use it to create segments. This lack of functionality currently holding us back on segmentation!

[AllanHeo]

"created_at" might be synonymous with "first used app" which is one of the filters available in Braze. Were you able to resolve this issue?