Reworking, patching and cleaning the extension

frontend/src/rest/requests.js

@@ -74,4 +74,8 @@ export async function getExempReq(id){
 
 export async function editExempReqState(id, newstate){
     return restPatch("/exemptionsreq/"+id+"/"+newstate)
+}
+
+export async function getExempByUser(userId){
+    return restGet("/exemptionreq/"+userId)
 }