Module OAUTH2 unable to delete data

I need help to delete data into module OAUTH2.
At the beginning, my module was on a nas in my garage and I try to configure it to work with o365.
But I wasn’t able to arrive.
After, I transfer my Dolibarr programm on a VM on Microsft Azzure.
So I try to complete the configuration of the module OAUTH2 but I wasn"t able to delete old entry into the module.
If I click on the “rubish icon” and confirm, the result is the page with is
Site unreachable
locahost did’nt allow the connection
Check connection and firewall

Is there a way to find where these datas are stored and delete all?

Thank you for your help