diff --git a/getmemberships.php b/getmemberships.php
index 71b393f..d926e6b 100755
--- a/getmemberships.php
+++ b/getmemberships.php
@@ -12,8 +12,7 @@ list($projectsById, $projectsByDomain) = getProjectList($limit, $offset, $client
 writeDomains($projectsByDomain);
 $userList = getUserList($limit, $offset, $client);
 $membershipMapping = getUserMemberships($userList, $client);
-print_r($projectsById);
-print_r($membershipMapping);
+writeUsers($projectsById, $membershipMapping);
 
 function writeDomains($projectsByDomain) {
   $domainHandle = fopen('./data/domainmap.csv', 'w');
@@ -23,6 +22,14 @@ function writeDomains($projectsByDomain) {
   fclose($domainHandle);
 }
 
+function writeUsers($projectsById, $membershipMapping) {
+  $domainHandle = fopen('./data/usermap.csv', 'w');
+  foreach ($membershipMapping as $email => $projectId) {
+    fwrite ($domainHandle, "$email,{$projectsById[$projectId]}\n");
+  }
+  fclose($domainHandle);
+}
+
 function getProjectList($limit, $offset, $client) {
   //  We'll set a more realistic total user count after the first loop.
   $totalProjects = 99999;