Automating github login through Selenium Webdriver

Hi guys I am trying to automate the github login process through selenium web driver in java , everything is fine and okay except for the very first time when the user does not exist github asks the user to allow the access as shown in the picture

I am trying to find out that if the title of the window is authorize application than run a specific flow and if not run the usual flow but its not finding out the title and the test fails on the authorization screen and if I try to find the authorize green button it says the element is not enabled

The code is below for help

package com.silexica.selenium.tests;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.support.ui.ExpectedCondition;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.testng.annotations.Test;

public class GitHubLoginTest {

    @Test
    public void githubLogin() {

        // Set our gecko driver
        System.setProperty("webdriver.gecko.driver", "geckodriver");

        // setting up the firefox driver
        WebDriver driver = new FirefoxDriver();

        // Open website
        driver.get("");

        // wait for the google icon button to load
        WebDriverWait githubbuttonwait = new WebDriverWait(driver, 10);
        WebElement githubloginbutton = githubbuttonwait.until(ExpectedConditions
                .visibilityOfElementLocated(By.xpath("/html/body/div/div/div/div/div/form/ul/li/a[2]/img[2]")));

        // click the button if present
        githubloginbutton.click();

        // Find the email form field
        WebDriverWait githubemailfieldwait = new WebDriverWait(driver, 10);
        WebElement githubemailfield = githubemailfieldwait.until(ExpectedConditions
                .visibilityOfElementLocated(By.xpath("/html/body/div[3]/div[1]/div/form/div[3]/input[1]")));

        // Type the random email to the form
        githubemailfield.sendKeys("");

        // Find the password form field
        WebDriverWait githubpasswordfieldwait = new WebDriverWait(driver, 10);
        WebElement githubpasswordfield = githubpasswordfieldwait.until(ExpectedConditions
                .visibilityOfElementLocated(By.xpath("/html/body/div[3]/div[1]/div/form/div[3]/input[2]")));

        // Type password to the form. This needs not be unique.
        githubpasswordfield.sendKeys("");

        // find the sign up button
        WebDriverWait githubpasswordbutton = new WebDriverWait(driver, 10);
        WebElement passwordfieldsignupbutton = githubpasswordbutton.until(ExpectedConditions
                .visibilityOfElementLocated(By.xpath("/html/body/div[3]/div[1]/div/form/div[3]/input[3]")));

        // click the sign up button
        passwordfieldsignupbutton.click();

        // verify that the authorization window has the given text
        if ((new WebDriverWait(driver, 10)).until(new ExpectedCondition<Boolean>() {
            public Boolean apply(WebDriver driverObject) {
                return driverObject.getTitle().equals("Authorize application");
            }
        })) {

            // find the allow access button button in google password window
            WebDriverWait githubpasswordbutton2 = new WebDriverWait(driver, 10);
            WebElement passwordfieldsignupbutton2 = githubpasswordbutton2
                    .until(ExpectedConditions.visibilityOfElementLocated(
                            By.xpath("/html/body/div[4]/div[1]/div[2]/div[1]/div[2]/div[1]/form/button")));

            // click the button
            passwordfieldsignupbutton2.click();

            // verify that we have logged into the dashboard
            (new WebDriverWait(driver, 10)).until(new ExpectedCondition<Boolean>() {
                public Boolean apply(WebDriver driverObject) {
                    return driverObject.getTitle().equals("Silexica | Dashboard");
                }
            });

            driver.quit();

        } else {

            // Verify that whether we have logged into the dashboard and
            // continue the normal flow
            (new WebDriverWait(driver, 10)).until(new ExpectedCondition<Boolean>() {
                public Boolean apply(WebDriver driverObject) {
                    return driverObject.getTitle().equals("Silexica | Dashboard");
                }
            });

            // close the browser
            driver.quit();

        }

    }

}

Any suggestions or improvements