Refactoring of Users context

lib/mobilizon/crypto.ex

@@ -0,0 +1,15 @@
+defmodule Mobilizon.Crypto do
+  @moduledoc """
+  Utility module which contains cryptography related functions.
+  """
+
+  @doc """
+  Returns random byte sequence of the length encoded to Base64.
+  """
+  @spec random_string(integer) :: String.t()
+  def random_string(length) do
+    length
+    |> :crypto.strong_rand_bytes()
+    |> Base.url_encode64()
+  end
+end