[Instagram] Display more login errors (#1822)

Authored by: MinePlayersPE

yt_dlp/extractor/instagram.py

@@ -63,6 +63,10 @@ class InstagramBaseIE(InfoExtractor):
         if not login.get('authenticated'):
             if login.get('message'):
                 raise ExtractorError(f'Unable to login: {login["message"]}')
+            elif login.get('user'):
+                raise ExtractorError('Unable to login: Sorry, your password was incorrect. Please double-check your password.', expected=True)
+            elif login.get('user') is False:
+                raise ExtractorError('Unable to login: The username you entered doesn\'t belong to an account. Please check your username and try again.', expected=True)
             raise ExtractorError('Unable to login')
         InstagramBaseIE._IS_LOGGED_IN = True