fixed typo in if condition

app/__init__.py

@@ -49,7 +49,7 @@ def create_app(config_name):
         session['return_url'] = request.args.get('redir', vars.default_referrer)
 
 
-        if session['user'].get('eppa') in not valid_eppa:
+        if session['user'].get('eppa') not in  valid_eppa:
             return render_template('errors/error.html', title='shibboleth error')
 
         if rc_util.check_state(session['user'].get('username')) in invalid_state: