Migrating from Blackfyre to Arcane

Good day

Well this has been quite a nightmare migration due to the appearance of no consistency with the social logins.

I need to enable everyone who connected on Blackfyre using a steam account to work with WSL on Arcane.

Please confirm the meta data that needs to be converted to make this work. I tried to interpret the blackfyre meta data but it doesnt make sense when compared to the WSL plugins Steam registered users.

Is there a way to reverse engineer the username created into a steam ID/profile url? I can then use the steam API for conversion.

Basically, I need to know how the blackfyre version of steam login works, whether is magic or some plastered together js.

Thanks in Advance