Best way to import customer base in cloud instance

[Aaron Geister]

Looking for best practice for importing customers in a cloud instance using Onelogin with out a big import. We are sending invites out in the specified groups one department at a time. Is this good way to do this or a better way. We have an Icon for Atlassian that is connected to our onelogin for our business. Please advice if there is a better way or if this is a correct