Grafana login page

I am trying to modify the login page by modifying Branding.tsv file with this path /usr/share/grafana/public/app/core/components/Branding/Branding.tsv. The changes don’t reflect on the login page after restarting grafana local server in raspberry pi linux debian operating system.
I modified the following lines
static AppTitle = ‘XXX’;
static LoginTitle=‘XXX’
the changes are not reflected when I open login page. What did I miss?