Call Salesforce Rest API with Elixir

salesforce.exs

# inspiration/guide: https://developer.sage.com/api/financials/how-to/configure-authentication/
defmodule Salesforce do
  @user_email "XXX"
  @user_password "XXX"
  @client_id "XXX"
  @client_secret "XXX"

  def get_credentials() do
    response = HTTPoison.post!(
      "https://login.salesforce.com/services/oauth2/token", 
      {:form, [grant_type: "password", client_id: @client_id, client_secret: @client_secret, username: @user_email, password: @user_password]}, 
      [{:"Content-Type", "application/x-www-form-urlencoded"}]
    )
    |> Map.get(:body)
    |> Jason.decode!()

    %{access_token: response["access_token"], instance_url: response["instance_url"]}
  end

  def query(credentials, soql) do
    url = "#{credentials.instance_url}/services/data/v43.0/queryAll?#{URI.encode_query(q: soql)}"
    HTTPoison.get!(url, [{:Authorization, "Bearer #{credentials.access_token}"}, {:"Content-Type", "application/json"}])
    |> Map.get(:body)
    |> Jason.decode!()
  end
end

# # calling it like: 
# credentials = Salesforce.get_credentials()
# accounts = Salesforce.query(credentials, "SELECT Id, Name FROM Account")