diff --git a/handlers/application/administration.go b/handlers/application/administration.go
index 15b93a5..4151433 100755
--- a/handlers/application/administration.go
+++ b/handlers/application/administration.go
@@ -211,165 +211,167 @@ func (h *ApplicationHandler) AdministrationGroupDisplay(w http.ResponseWriter, r
 func (h *ApplicationHandler) AdministrationGroupInviteAdmin(w http.ResponseWriter, r *http.Request) {
 	vars := mux.Vars(r)
 	groupid := vars["groupid"]
+	var (
+		groupresp   *groupsmanagement.GetGroupResponse
+		accountresp *accounts.GetAccountUsernameResponse
+		err         error
+	)
+	go func() {
+		groupresp, err = h.services.GRPC.GroupsManagement.GetGroup(context.TODO(), &groupsmanagement.GetGroupRequest{
+			Id:        groupid,
+			Namespace: "parcoursmob_organizations",
+		})
 
-	groupresp, err := h.services.GRPC.GroupsManagement.GetGroup(context.TODO(), &groupsmanagement.GetGroupRequest{
-		Id:        groupid,
-		Namespace: "parcoursmob_organizations",
-	})
-
-	if err != nil {
-		fmt.Println(err)
-		w.WriteHeader(http.StatusInternalServerError)
-		return
-	}
-
+		if err != nil {
+			fmt.Println(err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+	}()
 	r.ParseForm()
 
-	accountresp, err := h.services.GRPC.MobilityAccounts.GetAccountUsername(context.TODO(), &accounts.GetAccountUsernameRequest{
-		Username:  r.FormValue("username"),
-		Namespace: "parcoursmob",
-	})
+	go func() {
+		accountresp, err = h.services.GRPC.MobilityAccounts.GetAccountUsername(context.TODO(), &accounts.GetAccountUsernameRequest{
+			Username:  r.FormValue("username"),
+			Namespace: "parcoursmob",
+		})
+		if err == nil {
+			// Account already exists : adding the existing account to admin list
+			account := accountresp.Account.ToStorageType()
+			account.Data["groups"] = append(account.Data["groups"].([]any), groupid, groupid)
+			account.Data["groups"] = append(account.Data["groups"].([]any), groupid, groupid+":admin")
 
-	if err == nil {
-		// Account already exists : adding the existing account to admin list
-		account := accountresp.Account.ToStorageType()
-		account.Data["groups"] = append(account.Data["groups"].([]any), groupid, groupid)
-		account.Data["groups"] = append(account.Data["groups"].([]any), groupid, groupid+":admin")
+			as, _ := accounts.AccountFromStorageType(&account)
 
-		as, _ := accounts.AccountFromStorageType(&account)
+			_, err = h.services.GRPC.MobilityAccounts.UpdateData(
+				context.TODO(),
+				&accounts.UpdateDataRequest{
+					Account: as,
+				},
+			)
 
-		_, err = h.services.GRPC.MobilityAccounts.UpdateData(
-			context.TODO(),
-			&accounts.UpdateDataRequest{
-				Account: as,
-			},
-		)
-
-		fmt.Println(err)
-
-		data := map[string]any{
-			"group": groupresp.Group.ToStorageType().Data["name"],
-		}
-
-		if err := h.emailing.Send("onboarding.existing_administrator", r.FormValue("username"), data); err != nil {
 			fmt.Println(err)
+
+			data := map[string]any{
+				"group": groupresp.Group.ToStorageType().Data["name"],
+			}
+
+			if err := h.emailing.Send("onboarding.existing_administrator", r.FormValue("username"), data); err != nil {
+				fmt.Println(err)
+			}
+
+			http.Redirect(w, r, fmt.Sprintf("/app/administration/groups/%s", groupid), http.StatusFound)
+			return
+		} else {
+			// Onboard now administrator
+			onboarding := map[string]any{
+				"username": r.FormValue("username"),
+				"group":    groupid,
+				"admin":    true,
+			}
+
+			b := make([]byte, 16)
+			if _, err := io.ReadFull(rand.Reader, b); err != nil {
+				fmt.Println(err)
+				w.WriteHeader(http.StatusInternalServerError)
+				return
+			}
+			key := base64.RawURLEncoding.EncodeToString(b)
+
+			h.cache.PutWithTTL("onboarding/"+key, onboarding, 168*time.Hour) // 1 week TTL
+
+			data := map[string]any{
+				"group": groupresp.Group.ToStorageType().Data["name"],
+				"key":   key,
+			}
+
+			if err := h.emailing.Send("onboarding.new_administrator", r.FormValue("username"), data); err != nil {
+				fmt.Println(err)
+				w.WriteHeader(http.StatusInternalServerError)
+				return
+			}
 		}
 
 		http.Redirect(w, r, fmt.Sprintf("/app/administration/groups/%s", groupid), http.StatusFound)
 		return
-	} else {
-		// Onboard now administrator
-		onboarding := map[string]any{
-			"username": r.FormValue("username"),
-			"group":    groupid,
-			"admin":    true,
-		}
-
-		b := make([]byte, 16)
-		if _, err := io.ReadFull(rand.Reader, b); err != nil {
-			fmt.Println(err)
-			w.WriteHeader(http.StatusInternalServerError)
-			return
-		}
-		key := base64.RawURLEncoding.EncodeToString(b)
-
-		h.cache.PutWithTTL("onboarding/"+key, onboarding, 168*time.Hour) // 1 week TTL
-
-		data := map[string]any{
-			"group": groupresp.Group.ToStorageType().Data["name"],
-			"key":   key,
-		}
-
-		if err := h.emailing.Send("onboarding.new_administrator", r.FormValue("username"), data); err != nil {
-			fmt.Println(err)
-			w.WriteHeader(http.StatusInternalServerError)
-			return
-		}
-	}
-
-	http.Redirect(w, r, fmt.Sprintf("/app/administration/groups/%s", groupid), http.StatusFound)
-	return
+	}()
 }
-
 func (h *ApplicationHandler) AdministrationGroupInviteMember(w http.ResponseWriter, r *http.Request) {
 	vars := mux.Vars(r)
 	groupid := vars["groupid"]
+	var (
+		group storage.Group
+	)
+	groupCh := make(chan storage.Group)
+	go func() {
+		groupresp, err := h.services.GRPC.GroupsManagement.GetGroup(context.TODO(), &groupsmanagement.GetGroupRequest{
+			Id:        groupid,
+			Namespace: "parcoursmob_organizations",
+		})
 
-	groupresp, err := h.services.GRPC.GroupsManagement.GetGroup(context.TODO(), &groupsmanagement.GetGroupRequest{
-		Id:        groupid,
-		Namespace: "parcoursmob_organizations",
-	})
-
-	if err != nil {
-		fmt.Println(err)
-		w.WriteHeader(http.StatusInternalServerError)
-		return
-	}
-
-	group := groupresp.Group.ToStorageType()
-
+		if err != nil {
+			fmt.Println(err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+		group := groupresp.Group.ToStorageType()
+		groupCh <- group
+	}()
 	r.ParseForm()
+	go func() {
+		group = <-groupCh
+		accountresp, err := h.services.GRPC.MobilityAccounts.GetAccountUsername(context.TODO(), &accounts.GetAccountUsernameRequest{
+			Username:  r.FormValue("username"),
+			Namespace: "parcoursmob",
+		})
+		if err == nil {
+			account := accountresp.Account.ToStorageType()
+			account.Data["groups"] = append(account.Data["groups"].([]any), group.ID)
 
-	accountresp, err := h.services.GRPC.MobilityAccounts.GetAccountUsername(context.TODO(), &accounts.GetAccountUsernameRequest{
-		Username:  r.FormValue("username"),
-		Namespace: "parcoursmob",
-	})
+			as, _ := accounts.AccountFromStorageType(&account)
 
-	if err == nil {
-		account := accountresp.Account.ToStorageType()
-		account.Data["groups"] = append(account.Data["groups"].([]any), group.ID)
+			_, err = h.services.GRPC.MobilityAccounts.UpdateData(
+				context.TODO(),
+				&accounts.UpdateDataRequest{
+					Account: as,
+				},
+			)
+			data := map[string]any{
+				"group": group.Data["name"],
+			}
 
-		as, _ := accounts.AccountFromStorageType(&account)
+			if err := h.emailing.Send("onboarding.existing_member", r.FormValue("username"), data); err != nil {
+			}
 
-		_, err = h.services.GRPC.MobilityAccounts.UpdateData(
-			context.TODO(),
-			&accounts.UpdateDataRequest{
-				Account: as,
-			},
-		)
-
-		fmt.Println(err)
-
-		data := map[string]any{
-			"group": group.Data["name"],
-		}
-
-		if err := h.emailing.Send("onboarding.existing_member", r.FormValue("username"), data); err != nil {
-			fmt.Println(err)
-		}
-
-		http.Redirect(w, r, "/app/group/settings", http.StatusFound)
-		return
-	} else {
-		// Onboard now administrator
-		onboarding := map[string]any{
-			"username": r.FormValue("username"),
-			"group":    group.ID,
-			"admin":    false,
-		}
-
-		b := make([]byte, 16)
-		if _, err := io.ReadFull(rand.Reader, b); err != nil {
-			fmt.Println(err)
-			w.WriteHeader(http.StatusInternalServerError)
+			http.Redirect(w, r, "/app/group/settings", http.StatusFound)
 			return
+		} else {
+			// Onboard now administrator
+			onboarding := map[string]any{
+				"username": r.FormValue("username"),
+				"group":    group.ID,
+				"admin":    false,
+			}
+
+			b := make([]byte, 16)
+			if _, err := io.ReadFull(rand.Reader, b); err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				return
+			}
+			key := base64.RawURLEncoding.EncodeToString(b)
+
+			h.cache.PutWithTTL("onboarding/"+key, onboarding, 168*time.Hour) // 1 week TTL
+			data := map[string]any{
+				"group": group.Data["name"],
+				"key":   key,
+			}
+
+			if err := h.emailing.Send("onboarding.new_member", r.FormValue("username"), data); err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				return
+			}
 		}
-		key := base64.RawURLEncoding.EncodeToString(b)
-
-		h.cache.PutWithTTL("onboarding/"+key, onboarding, 168*time.Hour) // 1 week TTL
-
-		data := map[string]any{
-			"group": group.Data["name"],
-			"key":   key,
-		}
-
-		if err := h.emailing.Send("onboarding.new_member", r.FormValue("username"), data); err != nil {
-			fmt.Println(err)
-			w.WriteHeader(http.StatusInternalServerError)
-			return
-		}
-	}
-
+	}()
 	http.Redirect(w, r, "/app/administration/groups/"+group.ID, http.StatusFound)
 	return
 }