@chris , Thanks for writing back, I’m currently using API V1 for my use case, Also, would you help in what’s the major difference between these ??

using V1.

curl --user “:” --digest --include
–header “Content-Type: application/json”
–request POST “https://cloud.mongodb.com/api/atlas/v1.0/groups/id/databaseUsers
–data ’
{
“awsIAMType”: “USER”,
“databaseName”: “$external”,
“groupId”: “id”,
“roles”: [
{
“databaseName”: “sale1”,
“roleName”: “readWrite”,
“collectionName”: “sale2,sale1,sale3”
}
],
“username”: “ARN”
}'```



Would you also mind guiding with the API to update the existing users permission, I'm currently having a pretty hard time to figure this part.