add manage domain function

backend/app/tests/test_user.py

@@ -16,7 +16,7 @@ def test_users_list_for_admin(test_client,login_admin):
 
 def test_user_create(test_client,login_user):
     user_data = {
-        "email": "newuser@example.com",
+        "email": "newuser1@example.com",
         "password": "password123",
         "first_name": "New",
         "last_name": "User",
@@ -37,7 +37,7 @@ def test_user_create(test_client,login_user):
    
 def test_admin_create(test_client,login_user):
     user_data = {
-        "email": "newuser@example.com",
+        "email": "newuser2@example.com",
         "password": "password123",
         "first_name": "New",
         "last_name": "User",