What is the intended purpose for each of these DB users?

Neon🐘Postgres

SELECT usename FROM pg_user;
#    usename
1    cloud_admin
2    neondb_owner
3    neon_service

SELECT usename FROM pg_user;
#    usename
1    cloud_admin
2    neondb_owner
3    neon_service

SELECT usename FROM pg_user;
#    usename
1    cloud_admin
2    neondb_owner
3    neon_service

SELECT usename FROM pg_user;
#    usename
1    cloud_admin
2    neondb_owner
3    neon_service