Fix: Fixed path to STS (coscine/issues#725)

src/App.vue

@@ -144,7 +144,7 @@ function getReturnUrlParam() {
 
 function getReturnUrl(method: string) {
   const returnUrl = encodeURI(
-    '/coscine/api/Coscine.STS/' + method + '/login?returnUrl=' + getReturnUrlParam(),
+    '/coscine/api/Coscine.Api.STS/' + method + '/login?returnUrl=' + getReturnUrlParam(),
   );
   return returnUrl;
 }