Not sure what you mean by "data connector"....if you want to find out who is connecting to your database by which tool it would be something like:
.show queries
| where StartedOn > ago(3d)
| where User has "@my-company.com"
| extend appname = ClientRequestProperties["Options"]["request_app_name"]
| extend appname = iif(appname=="","some external application - Python Api etc",appname)
| summarize count() by appname
this would return a list:
appname count
Kusto.Explorer 5
some external appliction 16
KusWeb 33
....
