> user = Api::V2::User.all.where("username = 'admin'")
=> #<ActiveRecord::Relation [#<Api::V2::User id: 1, user_id: 1032, group_id: nil,
is_active: 1, is_admin: true, username: "admin", email: "nodeum@localhost",
key_id: 0, vector: "no-cipher", created_at: "2019-12-13...
> user.update(password: 'newpassword')
=> [#<Api::V2::User email: "nodeum@localhost", id: 1, user_id: 1032, group_id: nil,
is_active: 1, is_admin: true, username: "admin", key_id: 0, vector: "no-cipher",
created_at: "2019-12-13 11:46:30.000000000 +0000", updated_at: "2023-03-23
15:56:21.000000000 +0000", provider: nil, uid: nil>]