internet account passwords required multiple times a day.

so after updating to the new IOS 10.11.6

I started to get the pop up for my passwords for all of my yahoo internet accounts, this happened the last time I upgraded as well. My solution was to delete my email accounts and re-enter them, however after doing these steps, I keep getting the password requirement for the accounts every time I log into the computer. I'm really getting irritated with this occurrence.

how do i solve this issue?