Hi,
I’m not able to login on a new device because I’ve lost the auth app for square account.
Could you please remove the auth app from my account.
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Based on the information you’ve provided, the following documentation will help answer your question:
Additional Documentation
Deauthorize the Reader SDK
Square Authentication
Onboard to Square Appointments
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My laptop still logged in but will lose access to my square developer account any day. Other devices expecting auth app verification code which I lost access to.
How do I remove the 2MF auth app settings so I can only use my email / password to login
You’ll need to reach out to our Customer Success team to remove the 2FA on the account. 
sure, how do I do that? do you have a link? email?
is that the the same like Contact Developer & App Marketplace Support?
You’ll have to reach out through our Support Console.