[instagram] use REST API by default

regardless of logged in status

docs/configuration.rst

@@ -1514,13 +1514,12 @@ extractor.instagram.api
 Type
     ``string``
 Default
-    ``"auto"``
+    ``"rest"``
 Description
     Selects which API endpoints to use.
 
-    * ``"rest"``: REST API - higher-resolution media, only usable when logged in
-    * ``"graphql"``: GraphQL API - lower-resolution media, partially accessible when not logged in
-    * ``"auto"``: Use REST API when logged in, GraphQL API otherwise
+    * ``"rest"``: REST API - higher-resolution media
+    * ``"graphql"``: GraphQL API - lower-resolution media
 
 
 extractor.instagram.include

docs/gallery-dl.conf

@@ -159,7 +159,7 @@
         },
         "instagram":
         {
-            "api": "auto",
+            "api": "rest",
             "cookies": null,
             "include": "posts",
             "sleep-request": [6.0, 12.0],

gallery_dl/extractor/instagram.py

@@ -44,14 +44,10 @@ class InstagramExtractor(Extractor):
     def items(self):
         self.login()
 
-        api = self.config("api")
-        if api is None or api == "auto":
-            api = InstagramRestAPI if self._logged_in else InstagramGraphqlAPI
-        elif api == "graphql":
-            api = InstagramGraphqlAPI
+        if self.config("api") == "graphql":
+            self.api = InstagramGraphqlAPI(self)
         else:
-            api = InstagramRestAPI
-        self.api = api(self)
+            self.api = InstagramRestAPI(self)
 
         data = self.metadata()
         videos = self.config("videos", True)