fix main change owner route, fix group create id return, add new client

http.go

@@ -2,8 +2,8 @@ package main
 
 import (
 	"context"
-	"encoding/binary"
 	json2 "encoding/json"
+	"fmt"
 	"maps"
 	"net/http"
 	"slices"
@@ -87,7 +87,7 @@ func getIfOwnerClientAndGroup(ctx context.Context, response *http.ResponseWriter
 	return client, group, nil
 }
 
-func HttpHandleNewUser(response http.ResponseWriter, request *http.Request) {
+func HttpHandleNewClient(response http.ResponseWriter, request *http.Request) {
 	if !isMethodAllowed(&response, request) {
 		return
 	}
@@ -131,7 +131,7 @@ func HttpHandleNewUser(response http.ResponseWriter, request *http.Request) {
 		return
 	}
 
-	response.WriteHeader(http.StatusAccepted)
+	response.WriteHeader(http.StatusCreated)
 	response.Write([]byte("created"))
 }
 
@@ -234,11 +234,8 @@ func HttpHandeNewGroup(response http.ResponseWriter, request *http.Request) {
 		http.Error(response, err.Error(), http.StatusInternalServerError)
 		return
 	}
-	groupIdBytes := make([]byte, 4)
-	binary.BigEndian.PutUint32(groupIdBytes, group.Id)
-
 	response.WriteHeader(http.StatusCreated)
-	response.Write(groupIdBytes)
+	fmt.Fprintf(response, "%d", group.Id)
 }
 
 func HttpHandleGroupAddClient(response http.ResponseWriter, request *http.Request) {
@@ -295,11 +292,7 @@ func HttpHandleGroupAddClient(response http.ResponseWriter, request *http.Reques
 	}
 
 	response.WriteHeader(http.StatusAccepted)
-	_, err = response.Write([]byte("ok"))
-	if err != nil {
-		http.Error(response, "internal server error", http.StatusInternalServerError)
-		return
-	}
+	response.Write([]byte("ok"))
 }
 
 func HttpHandleGroupRemoveClient(response http.ResponseWriter, request *http.Request) {