Callback implementation for Ueberauth.Strategy.default_options/0.

@spec extra(Plug.Conn.t()) :: Ueberauth.Auth.Extra.t()

Stores the raw information obtained from the Steam callback.

Returns the steamuser saved in the conn as raw_info.

@spec handle_request!(Plug.Conn.t()) :: Plug.Conn.t()

Handles initial request for Steam authentication.

Redirects the given conn to the Steam login page.

@spec info(Plug.Conn.t()) :: Ueberauth.Auth.Info.t()

Fetches the fields to populate the info section of the Ueberauth.Auth struct.

Takes the information from the steamuser saved in the conn.

@spec uid(Plug.Conn.t()) :: pos_integer()

Fetches the uid field from the response.

Takes the steamid from the steamuser saved in the conn.