Update user without password in Elixir Phoenix with Guardian plug

user.ex

#
# web/models/user.ex
#
defmodule Plans.User do
  use Plans.Web, :model
  
    @primary_key {:id, :binary_id, autogenerate: true}
    schema "users" do
      field :username, :string
      field :email, :string
      field :password, :string, virtual: true
      field :encrypted_password, :string
      field :created, Ecto.DateTime, default: Ecto.DateTime.utc
  
      timestamps()
    end

  @required_fields ~w(email password)
  @optional_fields ~w(username email encrypted_password)
  
  @doc """
  Builds a changeset based on the `struct` and `params`.
  """
  def changeset(struct, params \\ %{}) do
    struct
    |> cast(params, @required_fields, @optional_fields)
    |> hash_password
    |> unique_constraint(:email)
  end

  @doc """
  Update user profile without providing a password
  """
  def changeset_profile(struct, params \\ %{}) do
    struct
    |> cast(params, [:name], [])
  end

end