admin = db.getSiblingDB('admin');
admin.createUser(
  {
    user: "admin",
    pwd: "HenryPump@1903",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
);
poc = db.getSiblingDB('poc');
poc.createUser({
  user: "poc_www",
  pwd: "HenryPump1903",
  roles: [ { role: "readWrite", db: "poc" } ]
});

poc.createUser({
  user: "poc_java",
  pwd: "HenryPump@1903",
  roles: [ { role: "readWrite", db: "poc" } ]
});