suport delete

config.py

@@ -5,6 +5,11 @@ class Config:
     SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or 'postgresql://postgres:password@localhost:5432/email_organizer_dev'
     SQLALCHEMY_TRACK_MODIFICATIONS = False
 
+class TestingConfig(Config):
+    TESTING = True
+    SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'  # In-memory database for tests
+
 config = {
-    'default': Config
+    'default': Config,
+    'testing': TestingConfig
 }