I heard back from the Dreo team:
Your login failure is due to a current limitation: EU-region accounts are not yet supported in our auth flow. No developer key or app-specific token is required. We will add EU support next week and publish an update accordingly.
Once the update is live, I’ll release a JavaScript version of the pydreo codebase so others can use it as well. After that, I’ll start working on the Dreo app for Homey. I’ll keep y’all posted!
Wow so sorry for my lack of checking back here Abe.
Great you are looking into this and got the ball rolling so far already.
Very very much appreciated 
Feel free to let me know later on when you get more into it.
I can atleast help you test with their fans as I have t total of 3 Dreo fans here;
2x DR-HTF002S aka Dreo Smart Quiet Tower Fan (see Dreo Smart Quiet Tower Fan with Cooling, 106 cm WiFi Alexa Tower Fan, 90° Oscillating Fan, Remote Control, 9-Speed, 4 Modes, 12 Hour Timer, Voice Control, Cruiser Pro T2S, Black : Amazon.de: Home & Kitchen )
1 x DR-HTF004S aka Dreo Pilot Max S (see Dreo 25dB Quiet Smart Tower Fan with Voice Control, WiFi Alexa Fan, App Control, 120° Oscillating Floor Fan, 12 Speeds, 4 Modes, 12-Hour Timer, Pilot Max S : Amazon.de: Home & Kitchen )
Thanks again for all your efforts!
Good to know! Thanks.
We’ve ordered three different types of devices from the States for integration and testing purposes; a tower fan, circulation fan and a evaporative humidifier.
I’ll let you know as soon as there’s something to test 
Ah nice! Very cool (yeah yeah pun intended) that you are looking into this!
By all means feel free to let me know later on
Just go an email from the Dreo development team that they’ve updated the pydreo codebase to support regions outside of the US. The samples are currently also on their way. Soooo…..
Nice mate looking forward to this.
Keep us posted if you dont mind
Had a great chat with the DREO team at IFA last weekend. They’re eager to handle the integration themselves, ensuring that new devices are supported the moment they launch. We’ll be onboarding them as an official partner soon 
Awesome Abe!
Hope to see their integration.
Thanks again for all the effort
That’s awesome to hear
Any word on if this is moving along Abe?
The DREO team is actively developing the Homey integration at the moment! Keep y’all posted
Thanks for confirming Abe, very much appreciate the headsup.
Look forward to see Dreo get fully onboarded 
