Made a None token revert -> ''

Author: Zeviraty

src/gitfetch/config.py

@@ -255,15 +255,15 @@ def set_custom_box(self, box: str) -> None:
             self.config['DEFAULT'] = {}
         self.config['DEFAULT']['custom_box'] = box
 
-    def get_token(self) -> Optional[str]:
+    def get_token(self) -> str:
         """
         Get the personal access token from config.
 
         Returns:
             Token or None if not set
         """
         token = self.config.get('DEFAULT', 'token', fallback='')
-        return token if token else None
+        return token if token else ''
 
     def set_token(self, token: str) -> None:
         """