I just upgraded to Laravel 5.7 and now I am using the built in Email Verification. However there is 2 things I have not been able to figure out and the primary issue is how
Navigate to these files
vendor/laravel/framework/src/Illuminate/Auth/MustVerifyEmail.php
vendor/laravel/framework/src/Illuminate/Auth/Notifications/VerifyEmail.php
and then customize it. you can even introduce a constructor in vendor/laravel/framework/src/Illuminate/Auth/Notifications/VerifyEmail.php and pass value through vendor/laravel/framework/src/Illuminate/Auth/MustVerifyEmail.php
eg: