If you're having difficulty signing in, you can do a few things.
If you've forgotten your email address
You can try searching your inbox for an email with the subject "Verify your Homey account" and checking the recipient.
If you've forgotten your password
You can reset your password by visiting accounts.athom.com.
If you've lost your 2FA device
You can reset your 2FA device by visiting I lost my two-factor authentication (2FA) device.