Renamed the auth parameter of Spotify.__init__ to access_token for better clarity.

Removed the `client_credentials_manager` and `oauth_manager` parameters because they are redundant.

Replaced the `set_auth` and `auth_manager` properties with standard attributes.

Removed the following deprecated methods from `Spotify`:
* `playlist_tracks`
* `user_playlist`
* `user_playlist_tracks`
* `user_playlist_change_details`
* `user_playlist_unfollow`
* `user_playlist_add_tracks`
* `user_playlist_replace_tracks`
* `user_playlist_reorder_tracks`
* `user_playlist_remove_all_occurrences_of_tracks`
* `user_playlist_remove_specific_occurrences_of_tracks`
* `user_playlist_follow_playlist`
* `user_playlist_is_following`

Removed the deprecated `as_dict` parameter from the `get_access_token` method of `SpotifyOAuth` and `SpotifyPKCE`.

Removed the deprecated `get_cached_token` and `_save_token_info` methods of `SpotifyOAuth` and `SpotifyPKCE`.

Removed `SpotifyImplicitGrant`.

Removed `prompt_for_user_token`.

tests/integration/non_user_endpoints/test.py

@@ -70,7 +70,8 @@ class AuthTestSpotipy(unittest.TestCase):
     @classmethod
     def setUpClass(self):
         self.spotify = Spotify(
-            client_credentials_manager=SpotifyClientCredentials())
+            auth_manager=SpotifyClientCredentials()
+        )
         self.spotify.trace = False
 
     def test_audio_analysis(self):
@@ -341,9 +342,9 @@ class AuthTestSpotipy(unittest.TestCase):
         self.assertTrue(find_album())
 
     def test_search_timeout(self):
-        client_credentials_manager = SpotifyClientCredentials()
+        auth_manager = SpotifyClientCredentials()
         sp = spotipy.Spotify(requests_timeout=0.01,
-                             client_credentials_manager=client_credentials_manager)
+                             auth_manager=auth_manager)
 
         # depending on the timing or bandwidth, this raises a timeout or connection error
         self.assertRaises((requests.exceptions.Timeout, requests.exceptions.ConnectionError),
@@ -352,17 +353,15 @@ class AuthTestSpotipy(unittest.TestCase):
     @unittest.skip("flaky test, need a better method to test retries")
     def test_max_retries_reached_get(self):
         spotify_no_retry = Spotify(
-            client_credentials_manager=SpotifyClientCredentials(),
+            auth_manager=SpotifyClientCredentials(),
             retries=0)
-        i = 0
-        while i < 100:
+        for i in range(100):
             try:
                 spotify_no_retry.search(q='foo')
             except SpotifyException as e:
                 self.assertIsInstance(e, SpotifyException)
                 self.assertEqual(e.http_status, 429)
                 return
-            i += 1
         self.fail()
 
     def test_album_search(self):
@@ -460,7 +459,7 @@ class AuthTestSpotipy(unittest.TestCase):
         sess = requests.Session()
         sess.headers["user-agent"] = "spotipy-test"
         with_custom_session = spotipy.Spotify(
-            client_credentials_manager=SpotifyClientCredentials(),
+            auth_manager=SpotifyClientCredentials(),
             requests_session=sess)
         self.assertTrue(
             with_custom_session.user(
@@ -469,7 +468,7 @@ class AuthTestSpotipy(unittest.TestCase):
 
     def test_force_no_requests_session(self):
         with_no_session = spotipy.Spotify(
-            client_credentials_manager=SpotifyClientCredentials(),
+            auth_manager=SpotifyClientCredentials(),
             requests_session=False)
         self.assertNotIsInstance(with_no_session._session, requests.Session)
         user = with_no_session.user(user="akx")