API - minor refacto

fittrackee/emails/email.py

@@ -132,7 +132,7 @@ class EmailService:
         parsed_url = parse_url(email_url)
         if parsed_url.scheme != 'smtp':
             raise InvalidEmailUrlScheme()
-        credentials = (
+        username, password = (
             parsed_url.auth.split(':')
             if parsed_url.auth
             else [None, None]  # type: ignore
@@ -140,11 +140,11 @@ class EmailService:
         return {
             'host': parsed_url.host,
             'port': 25 if parsed_url.port is None else parsed_url.port,
-            'use_tls': True if parsed_url.query == 'tls=True' else False,
-            'use_ssl': True if parsed_url.query == 'ssl=True' else False,
-            'username': credentials[0],
+            'use_tls': parsed_url.query == 'tls=True',
+            'use_ssl': parsed_url.query == 'ssl=True',
+            'username': username,
             'password': (
-                None if credentials[1] is None else unquote(credentials[1])
+                unquote(password) if isinstance(password, str) else password
             ),
         }