fixing typo in template

cms/templates/widgets/segment-io-footer.html

@@ -12,7 +12,7 @@
                 "${ user.id | n, js_escaped_string }",
                 {
                     email: "${ user.email | n, js_escaped_string }",
-                    username: "${ ser.username | n, js_escaped_string }"
+                    username: "${ user.username | n, js_escaped_string }"
                 },
                 {
                     integrations: {