How can I count my logins by a field?

[rebecalopes241]

I have this query and I want to count how many logins were made by id, like if a person logged in 3 times I just want to count once and if there were 15 logins in total I just want to count one per id

basic search 
| fields idLogin 
| stats values(idLogin) as Login, dc(idLogin) as Quantity  
| table Quantity

  but my field idLogin is return null 

[ITWhisperer]

Your requirement seems self-contradictory - are you wanting the number of times each id was used to login or just a list of the ids used to login?

First case:

| stats count by loginid

Second case:

| dedup loginid
| table loginid