I am trying to get the user sys_id
by username
using the SNOW REST API
. But I couldn't find a way of doing it in the SNOW API
doc.
Is it impossible to do so or any other alternative way of doing it?
Yes, this is a simple GET call. sys_id isn't returned on the default fields but will be returned if you explicitly request it:
https://[your instance].service-now.com/api/now/table/sys_user?sysparm_query=user_name%3D[your username]&sysparm_fields=sys_id&sysparm_limit=1
The REST api explorer is very handy for building and testing queries like this. You can find it by searching the navigator.