Add Media-Token beside access token

Media-Token can be used only to access the content, but unable to modify user data

server/flask/application/backend/data/migration.py

@@ -0,0 +1,13 @@
+import sqlite3
+import sys
+
+def migration_0_to_1(db_path: str):
+    db = sqlite3.connect(db_path, detect_types=sqlite3.PARSE_DECLTYPES)
+    db_cursor = db.cursor()
+    db_cursor.execute("ALTER TABLE session ADD media_token TEXT NOT NULL;")
+    db.commit()
+    db.close()
+
+if __name__ == "__main__":
+    print(sys.argv[1])
+    #migration_0_to_1(sys.argv[1])