Generate the user invite link only in one location

src/mailer.js

@@ -125,9 +125,10 @@ function mailUserEvent(mailTo, user, event) {
     });
 }
 
-function sendInvite(user, invitor) {
+function sendInvite(user, invitor, inviteLink) {
     assert.strictEqual(typeof user, 'object');
-    assert(typeof invitor === 'object');
+    assert.strictEqual(typeof invitor, 'object');
+    assert.strictEqual(typeof inviteLink, 'string');
 
     debug('Sending invite mail');
 
@@ -137,7 +138,7 @@ function sendInvite(user, invitor) {
         var templateData = {
             user: user,
             webadminUrl: settings.adminOrigin(),
-            setupLink: `${settings.adminOrigin()}/setupaccount.html?resetToken=${user.resetToken}&email=${encodeURIComponent(user.email)}` + (user.username ? `&username=${user.username}` : ''),
+            inviteLink: inviteLink,
             invitor: invitor,
             cloudronName: mailConfig.cloudronName,
             cloudronAvatarUrl: settings.adminOrigin() + '/api/v1/cloudron/avatar'