[exception] improve AuthRequired messages

gallery_dl/extractor/civitai.py

@@ -200,7 +200,7 @@ class CivitaiExtractor(Extractor):
         if "Authorization" not in self.api.headers and \
                 not self.cookies.get(
                 "__Secure-civitai-token", domain=".civitai.com"):
-            raise exception.AuthRequired(("'api-key'", "cookies"))
+            raise exception.AuthRequired(("api-key", "authenticated cookies"))
 
     def _parse_query(self, value):
         return text.parse_query_list(

gallery_dl/extractor/facebook.py

@@ -318,7 +318,9 @@ class FacebookExtractor(Extractor):
 
             if ('"props":{"title":"This content isn\'t available right now"' in
                     profile_photos_page):
-                raise exception.AuthRequired("cookies")
+                raise exception.AuthRequired(
+                    "authenticated cookies", "profile",
+                    "This content isn't available right now")
 
             set_id = self._extract_profile_set_id(profile_photos_page)
             avatar_page_url = text.extr(

gallery_dl/extractor/iwara.py

@@ -341,7 +341,8 @@ class IwaraAPI():
 
     def favorites(self, type):
         if not self.username:
-            raise exception.AuthRequired("'username' & 'password'")
+            raise exception.AuthRequired(
+                "username & password", "your favorites")
         endpoint = f"/favorites/{type}s"
         return self._pagination(endpoint)
 

gallery_dl/extractor/madokami.py

@@ -31,7 +31,7 @@ class MadokamiMangaExtractor(MadokamiExtractor):
     def items(self):
         username, password = self._get_auth_info()
         if not username:
-            raise exception.AuthRequired("'username' & 'password'")
+            raise exception.AuthRequired("username & password")
         self.session.auth = util.HTTPBasicAuth(username, password)
 
         url = f"{self.root}/Manga/{self.groups[0]}"