Add ?username and ?fromURI parameters simultaneously

I am trying to build a custom Url that redirects to Okta Auth from an app and also passes a fromURI to redirect them back to.

However, if I include one, it ignores the second one such as
https://{{orgOrgURL}}/login/login.htm?fromURI={{url}?username={{userName}}

Is there anyway I can add both?

Solved the issue forgot a &