Can't login at https://account.mojang.com/login

Hi,

I reset my password already a couple of times in order to login at 

https://account.mojang.com/login

Unfortunately, the interface tells me that either my login or password is incorrect.

Please advise, I'd like to migrate my Minecraft version to microsoft to play it. I didn't play for a couple of years but looking forward to do so again.

Many thanks,

Roland