make easy to copy-paste login code

accounts.js

@@ -172,14 +172,17 @@ function create(app) {
     }).then(function (code) {
       var emailParams = {
         to:      params.username,
-        from:    'login@daplie.com',   // opts.mailer.defaults.system
+        from:    'login@daplie.com',
         replyTo: 'hello@daplie.com',
-        subject: "Use " + code.code + " as your Login Code",  // message.Subject
-        text:    code.code + " is your Login Code."        // message['stripped-html']
+        subject: "Use " + code.code + " as your Login Code",
+        text: "Your login code is:\n\n"
+              + code.code
+              + "\n\nThis email address was used to request to add your Hello ID to a device."
+              + "\nIf you did not make the request you can safely ignore this message."
       };
       emailParams['h:Reply-To'] = emailParams.replyTo;
 
-      return req.getSiteMailer().sendMailAsync(emailParams).then(function () {
+      return req.getSiteCapability('email@daplie.com').sendMailAsync(emailParams).then(function () {
         return {
           code_id: code.id,
           expires: code.expires,