Users created by pipeline but not showing in snaplogic UI

I have created a pipeline to add users in snaplogic.After executing the pipeline using triggered task, i am getting the response that user is created successfully and verified the same using “fetch data using email” rest api.but in ui i am not finding that user.
Can someone help here?

When the user was created, was it also added to the members group of the org?
If not, the user was only added to the platform backend, but not to your org.

When i am trying to add users in members group using rest api i am getting “user A can not access user B”.and status code is 403.User A is admin of the organization.please provide some help here