If you can still talk to the creators, I'd recommend asking for one of their other accounts.
If all else fails, I suppose you could just link to discord.com and label the link "(blah) on Discord."
I have some characters I'd like to put on Toyhouse but some of the creators don't have something I can link back to since I obtained the characters via Discord.
Also sorry if I posted in the wrong spot this is my first time using the forums so let me know if I did something wrong