Crossref plugin without ISSN

I am unclear about the order of things to start a publication. The first issue of our journal is ready for publication with more than 5 original articles. However, the Library of Congress do not issue ISSNs to online journals before they publish 5 articles, and the OJS 3.3 Crossref plugin requires entering an ISSN. Any suggestions?

@vcardenas in this situation I have advised journals to publish the issue, apply for the ISSN, apply DOIs once the ISSN is received and then register the DOIs with CrossRef.