Admin user is not there in couch base cluster

Hi All,

     I've created a cluster in couch base server (Community 4.0.0 & Linux OS) with an Admin user. Created some buckets, documents, views & indexes. After that I've shut down the server and started it after few days. Now, I've logged in as admin user, it looks he's read only user. How can I create/assign admin rights to the user? What has crashed the user. Please suggest me