[SOLVED] SMTP configuration and other service

hi,
I try to configure SMTP service but when I modify the /var/snap/thinger-maker-server/common/config.json there is no effect. The file which seems to be read when I start the thinger service is not modify : the /snap/thinger-maker-server/current/config/config.json
I have the same trouble with the log. I have no data neither in /snap/thinger-maker-server/current/config/logs, nor /var/snap/thinger-maker-server/common/logs

Thanks