testing something else for the if exsist

Signed-off-by: Ebbe Baß <ebbe.bass>

server/app.py

@@ -53,7 +53,7 @@ def register_tube(mac_address):
     print(existing_tube)
 
     # Check if the tube exsist. If it doesn't create a new db row
-    if existing_tube is None:
+    if not existing_tube:
         cur.execute("INSERT INTO tubes (mac_address, universe, dmx_address) VALUES (%s, %s, %s)",
         (mac_address, 0, 1))
     else: