I clicked "Sign up" and it linked my ebay account. But i was never given the opportunity to create a bidslammer password

Hello Craig,
Thank you for your question about logging in. Make sure not to use your eBay password here, since we don't use that.
Use this link to reset your password with us.
https://bidslammer.com/user/mailpass
It is supposed to take you to your dashboard after authorization, not the home page. So if the above doesn't solve the issue, I'll watch for your reply and we can take the next step. I have logging turned on now, so I can see what's going on if there is an issue.