They have a PoS webpage that you or staff can use without full wallet access.

A good guide here by nostr:nprofile1qqspnzgrfett3asxcuj0gksje6z2zxzpvgd27uvz58m9vsuqh8zzw6cpr9mhxw309a382emdv9hzumt8w4ujumn9wsargwp58qq3vamnwvaz7tmzv46xztnwdaehgunfdshxxctdqydhwumn8ghj7en9v4j8xtnwdaehgu3wvfskuep0w3hku7gpewmsc.

https://www.btcsessions.ca/post/coinos-bitcoin-wallet