user

/ˈjuzər/
noun
  1. A person who uses or operates something, especially a computer, device, or service.
    • The new app has millions of users around the world.
    • The library offers training for new computer users.
    • Each user must create a password to log in.
  2. A person who takes or consumes something, such as a product or resource.
    • The survey asked about the habits of coffee users.
    • The park is a popular user of recycled water for its gardens.
    • Energy users are encouraged to reduce consumption during peak hours.