Before this Commit, While creating a custom appointment, The appointment name has 'Username' and invitation email also has 'Username'. When a customer receives the invitation email, The 'username' gets twice. After this Commit, We have removed the 'With username' part from the default email template. Task-2713963 closes odoo/odoo#82894 Related: odoo/enterprise#23197 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>