{
  "permissions": [
    "identity",
    "https://docs.google.com/spreadsheets/"
  ],
  "oauth2": {
    "client_id": "<enter-oauth2-client-id-here>",
    "scopes": [
      "https://docs.google.com/spreadsheets"
    ]
  }
}

console.log("here"); // this point is hit

var ci = chrome.identity;
ci.getAuthToken({ interactive: true }, function(token) {
    console.log("token: " + token); // none of this is hit
    if (chrome.runtime.lastError) {
        console.log(chrome.runtime.lastError);
        return;
    }
    access_token = token;
});