PMID

When the account was started, I generated a code and created a customized passcode, and have been using that since to have meetings.  I later realized I should have used my PMID in order to have the same meeting.  Can I arrange to change my generated code to the PMID since it's been used for so long without changing and confusing others?  I want to create a poll in advance of the meeting and need to schedule it in order to do that.