Since the In-App Personal Safety Button is tied to a specific device (for GPS purposes to know your real-time location during an emergency) and phone number (for contacting you during an emergency), each user of the feature will need their own license and login.
Fortunately, each account can have an unlimited number of licenses and logins that support the feature.
To enroll in additional licenses, refer to the article linked below. To add/edit logins with the necessary permissions, refer to the other article linked below.