No guys, this is incorrect. You can only get the ECA reference number once the assessment is complete. So you can't create an EE profile before this is done.
You need to be very patient during this process.
Regards
You will get the WES reference number before the assessment is completed. As matter of fact, that is the number which we can use to inquire for an update from WES, or for any other communication.
So yes, you do get the reference number even before your transcripts are assessed.
And, this number is more than enough for you to create your EE Profile.
But this is a risky proposition, because if you do not get your transcripts assessed from WES before your deadline of ITA submission date; you will not be able to proceed further.