Posting array with one existing users results in no user created

Posting array with one existing users results in no user created

by milan willems -
Number of replies: 0

I'm trying to add an arary of users to Moodle using moodle-client for Nodejs. When there is an existing user the in the array, all the other users aren't added. How can this be changed? 

Thanks in advance

Average of ratings: -