master_account type needs to be STR not INT on line 105 in disableguardduty.py

As an INT object, master accounts that start with a zero (0) character are flagged as invalid by the check on lines 112-114, as the account length is too short.

It seems to be correct in the enableguardduty.py script on line 121.

Open disableguardduty.py at line 105 and compare the master_account handling with enableguardduty.py line 121; then trace the length check at lines 112-114. Done means account IDs beginning with 0 remain valid and the existing invalid-length check still behaves correctly.

Written by the indexing model from the issue text.