Login with bad email or password, click submit
Return error message
Then while on the same page
CLEAR or send new text (correct email and password)
And Submit

driver.findElement(By.name("login_email")).sendKeys(Keys.chord(Keys.COMMAND, "a"),"email@gmail.com" );
        driver.findElement(By.id("login_password")).sendKeys(Keys.chord(Keys.COMMAND, "a"), "password");

WebElement email = driver.findElement......
WebElement password = driver.findElement.....
email.sendKeys....
password.sendKeys.....