Display unique key and table creation for externals tools
Modify the database to add two tables : -externals tools -appointments externals tools
The purpose of the first one is to save into the database all the informations regarding externals tools like jitsii, lufi or forms. The second one link two tables: externals tools and appointments. For each time an appointment need to use an external, id of both will be register here.
Display in calendar the unique key in case of an unfortunate event where the customer or the provider lose th email with all th einformation for an appointment.