IFTTT is supported, as is Alexa, so use those to your hearts content, but don’t forget to amend any credentials, when you change your password for Blink, or you’re bound to get locked out when those services try to repeatedly poll Blink’s servers with invalid credentials. I use Home Assistant too, but I think I use it to run IFTTT routines, so I’m still within their approved systems, when trying to log in to Blink.
Other providers, could well have failed to update their systems to handle the two step verification process, recently introduced, which might explain why it simply fell over, out of the blue for you.
I think I may have some things that try to connect without IFTTT, or Alexa, but they were just early experiments, so I haven’t used them for months. I suppose if I do, I may face the same challenge. If I get time, I’ll review what I have and see if I can see anything that tries to log into their API server, without offering the opportunity for two step verification. Well, I already know I have a few scripts, but thanks to the efforts of others in this forum, they have already been fixed.
Thanks for the heads up regarding the potential issue.
At least with IFTTT, you should be able to use any of the other services you were using anyway, because they probably exist on IFTTT too, to allow a link from one to the other to be created.