Agree with other commentor. I would not be handing out my nsec on any account I wanted to maintain control over to third party vendors. Nostr isn't to a point yet where you can absolutely avoid this, but be very very selective.

You know, but for anyone else out there the nsec is the signing key that gives you control over your account and profile. With it you can create notes, change your profile, unencrypt DMs, basically control your account. Once compromised you no longer have control and may as well scrap that profile and start anew.