Shopify.Multipass.get_token

You're seeing just the function get_token, go back to Shopify.Multipass module for more information.
Link to this function

get_token(customer_data, multipass_secret, config_opts \\ %{})

Specs

get_token(map(), binary(), map()) :: binary()

Calculates the Shopify Multipass token: an encrypted and signed message containing the customer data to be used for the Multipass SSO.