My API which authenticates via auth0 and returns the access_token. During the callback, the access_token throws invalid_token error. Not sure what is going on.

Here are my codes.

router.ex

scope "/auth", PxrfWeb do
    pipe_through [:browser]

    get "/:provider", AuthController, :request
    get "/:provider/callback", AuthController, :callback
  end

config.exs

config :pxrf, Pxrf.Auth.Guardian,
  issuer: "https://myissuer.xx.auth0.com/",
  secret_key: "xxxxxxxx"

auth_controller.ex

...
def callback(%{assigns: %{ueberauth_auth: auth}} = conn, %{"state" => state} = _params) do
    IO.inspect(auth)

   token = auth.extra.raw_info.token.access_token
    
    case Pxrf.Auth.Guardian.decode_and_verify(token) do
      {:ok, claims} ->
        user = Accounts.get_user_by_username(claims["sub"])
        
      {:error, _reason} ->
        nil
    end
end
...

When I run the following

iex> Guardian.decode_and_verify("eyJasds-----access-token-")
{:error, :invalid_token}

Been breaking my head for the past couple of days and can’t figure it out what is wrong. Looks like all my configuration and setup in the auth0 application seems to be correct. But still no luck.