Not able to sign into gmail using selenium

[Leo_Red]

I am trying to automate gmail by downloading attachments from my inbox using selenium. But, it is showing me this error "This browser or app may not be secure". I looked around and found that OAuth will solve the problem. But, I don't know how to use it or if it is the right tool to use. Can anyone help me solve this error. Is Oauth the right tool? Will using any other browser solve the problem?

I am getting the Options() because I am not able to open chrome as it is not in the default location. If you have a solution for that too. Thanks

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

options = Options()
options.binary_location = "/opt/google/chrome/google-chrome"    
options.add_argument("--start-maximized") 
options.add_argument("--no-sandbox") #bypass OS security model
options.add_argument("--disable-dev-shm-usage") 

options.add_experimental_option("excludeSwitches["enableautomation"])
options.add_experimental_option('useAutomationExtension', False)
driver = webdriver.Chrome(options=options, 
executable_path=r'./chromedriver')
driver.get('http://gmail.com/')

Error that is shown by gmail: This browser or app may not be secure. Learn more Try using a different browser. If you’re already using a supported browser, you can refresh your screen and try again to sign in.