Added changeset encyption function for password field

lib/sukaato/custom_validators.ex

@@ -1,6 +1,7 @@
 defmodule Sukaato.CustomValidators do
   import Ecto.Changeset
   import Validate
+  import Argon2
 
   @moduledoc """
   Provide a collecton of custom validation functions for Ecto database
@@ -24,4 +25,12 @@ defmodule Sukaato.CustomValidators do
       add_error(changeset, field, "is not a valid map")
     end
   end
+
+  def encrypt_password(changeset, field \\ :password) when is_atom(field) do
+    field_value = get_field(changeset, field)
+    field_value = hash_pwd_salt(field_value)
+
+    put_change(changeset, field, field_value)
+    changeset
+  end
 end