Migrate to motor for DB interaction

api/database/tokens.py

@@ -0,0 +1,25 @@
+from .db import token_collection
+
+
+async def is_blacklisted(token: str) -> bool:
+    """
+    Check if a token is still valid or if it is blacklisted
+
+    :param token: Token to check
+    :return: True if token is blacklisted, else False
+    """
+    db_token = await token_collection.find_one({"token": token})
+    if db_token:
+        return True
+    return False
+
+
+async def blacklist_token(token: str) -> str:
+    """
+    Add given token to the blacklist (invalidate it)
+
+    :param token: Token to invalidate
+    :return: Database ID of blacklisted token
+    """
+    db_token = await token_collection.insert_one({"token": token})
+    return str(db_token.inserted_id)