This is why a lot of services have just moved to using email with magic links to log people in.
In the end for a lot of services controlling your email is defacto controlling the login.
I am a vocal opponent to magic links via email (I am an unhinged person, in case it wasn't obvious before :) ).
I NEVER log into my mail from my laptop/desktop. I access my email via my phone's mail app.
So
1. try logging on via my laptop's browser
2. service sends a magic link to my email
3. click the link on my phone
4. now I'm logged in on my phone! not what I wanted!
Links sent in plaintext over the network. :(
I am a vocal opponent to magic links via email (I am an unhinged person, in case it wasn't obvious before :) ).
I NEVER log into my mail from my laptop/desktop. I access my email via my phone's mail app.
So
1. try logging on via my laptop's browser
2. service sends a magic link to my email
3. click the link on my phone
4. now I'm logged in on my phone! not what I wanted!