fixed typo in email variable name

app/static/scripts/function.js

@@ -7,7 +7,7 @@ function request_account() {
         fullname: document.getElementById("fullname").value,
         email: document.getElementById("email").value,
         reason: document.getElementById("reason").value,
-        username: document.getElementById("bid").value
+        username: document.getElementById("username").value
     })
 }