Magento Customer Grid Customisation is very handy.
Follow the steps to customise the Customer Grid in Magento 2 and add Customer last logged in date.
Step 1 :
app/code/Elightwalk/CustomerGrid/registration.php
Step 2 :
app/code/Elightwalk/CustomerGrid/etc/module.xml
Step 3 :
app/code/Elightwalk/CustomerGrid/view/adminhtml/ui_component/customer_listing.xml
Step 4 :
app/code/Elightwalk/CustomerGrid/Ui/Component/Listing/Column/LastLogin.php
Step 5 :
Inside your terminal or CMD