Add script to copy playlists from spotify to tidal

auth.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+
+import sys
+import spotipy
+import tidalapi
+import webbrowser
+import yaml
+
+def open_spotify_session(config):
+    credentials_manager = spotipy.SpotifyOAuth(username=config['username'],
+				       scope='playlist-read-private',
+				       client_id=config['client_id'],
+				       client_secret=config['client_secret'],
+				       redirect_uri=config['redirect_uri'])
+    try:
+        credentials_manager.get_access_token(as_dict=False)
+    except spotipy.SpotifyOauthError:
+        sys.exit("Error opening Spotify sesion; could not get token for username: ".format(config['username']))
+
+    return spotipy.Spotify(oauth_manager=credentials_manager)
+
+def open_tidal_session():
+    try:
+        with open('.session.yml', 'r') as session_file:
+            previous_session = yaml.safe_load(session_file)
+    except OSError:
+        previous_session = None
+
+    session = tidalapi.Session()
+    if previous_session:
+        success = session.load_oauth_session(previous_session['session_id'],
+                                   previous_session['token_type'],
+                                   previous_session['access_token'],
+                                   previous_session['refresh_token'] )
+        if success:
+            return session
+
+    login, future = session.login_oauth()
+    print('Login with the webbrowser: ' + login.verification_uri_complete)
+    url = login.verification_uri_complete
+    if not url.startswith('https://'):
+        url = 'https://' + url
+    webbrowser.open(url)
+    future.result()
+    with open('.session.yml', 'w') as f:
+        yaml.dump( {'session_id': session.session_id,
+                   'token_type': session.token_type,
+                   'access_token': session.access_token,
+                   'refresh_token': session.refresh_token}, f )
+    return session
+
+