By convention, a station-to-station user should be named something memorable (perhaps a name that is unique to your company or even to a job site).
As with all user, human and machine, you should carefully guard user passwords. Although frequently a station-to-station user is assigned a role with many admin-level Write permissions, every user, human and machine should be assigned roles that permit them (it) to access only the components required to do their job. To improve system security, do not make a station-to-station user a super user.
When adding this user, properties, such as Facets, Nav File, and Web Profile, which apply to browser access are inconsequential.