Suddenly in Windows Live Mail, my gmail will not download my mail and I get the message that the sever has rejected my username/password.  Now I am not sure if the password is the same that allows me to access my gmail online in my browser?  My gmail was working fine in Live Mail in Windows 10 until I had not accessed it for two weeks while I was out of town and did not take my laptop with me.  What can I do to correct this issue?

[Original subject: Windows Live Mail]