You can, and should, enable 2FA on your account, this prevents anyone without access to your 2FA codes from logging into your account. You can enable 2FA in the settings of the app.
- Go to Settings.
- Tap on Security.
- Switch 2FA on.
- Copy your 2FA key into your authenticator app.
- Copy the 6 digit code from your 2FA app into the Celsius app and Verify.
- Press Confirm 2FA in the confirmation email.