diff --git a/back/src/Model/RoomIdentifier.ts b/back/src/Model/RoomIdentifier.ts
index 2cba16fd..d1516264 100644
--- a/back/src/Model/RoomIdentifier.ts
+++ b/back/src/Model/RoomIdentifier.ts
@@ -1,14 +1,25 @@
 export class RoomIdentifier {
-    public anonymous: boolean;
-    public id:string
+    public readonly anonymous: boolean;
+    public readonly id:string
+    public readonly organizationSlug: string|undefined;
+    public readonly worldSlug: string|undefined;
+    public readonly roomSlug: string|undefined;
     constructor(roomID: string) {
         if (roomID.startsWith('_/')) {
             this.anonymous = true;
         } else if(roomID.startsWith('@/')) {
             this.anonymous = false;
+
+            const match = /@\/([^/]+)\/([^/]+)\/(.+)/.exec(roomID);
+            if (!match) {
+                throw new Error('Could not extract info from "'+roomID+'"');
+            }
+            this.organizationSlug = match[1];
+            this.worldSlug = match[2];
+            this.roomSlug = match[3];
         } else {
             throw new Error('Incorrect room ID: '+roomID);
         }
-        this.id = roomID; //todo: extract more data from the id (like room slug, organization name, etc);
+        this.id = roomID;
     }
-}
\ No newline at end of file
+}
diff --git a/back/src/Services/AdminApi.ts b/back/src/Services/AdminApi.ts
index 9e64296c..0039dc9c 100644
--- a/back/src/Services/AdminApi.ts
+++ b/back/src/Services/AdminApi.ts
@@ -51,9 +51,8 @@ class AdminApi {
             return Promise.reject('No admin backoffice set!');
         }
         try {
-            //todo: send more specialized data instead of the whole id
             const res = await Axios.get(ADMIN_API_URL+'/api/member/is-granted-access',
-                { headers: {"Authorization" : `${ADMIN_API_TOKEN}`}, params: {memberId, roomIdentifier: roomIdentifier.id} }
+                { headers: {"Authorization" : `${ADMIN_API_TOKEN}`}, params: {memberId, organizationSlug: roomIdentifier.organizationSlug, worldSlug: roomIdentifier.worldSlug, roomSlug: roomIdentifier.roomSlug} }
             )
             return !!res.data;
         } catch (e) {
diff --git a/front/src/Connexion/Room.ts b/front/src/Connexion/Room.ts
index 01509aa3..308ea5a2 100644
--- a/front/src/Connexion/Room.ts
+++ b/front/src/Connexion/Room.ts
@@ -66,7 +66,7 @@ export class Room {
             this.instance = match[1];
             return this.instance;
         } else {
-            const match = /_\/([^/]+)\/([^/]+)\/.+/.exec(this.id);
+            const match = /@\/([^/]+)\/([^/]+)\/.+/.exec(this.id);
             if (!match) throw new Error('Could not extract instance from "'+this.id+'"');
             this.instance = match[1]+'/'+match[2];
             return this.instance;