Problem in mobile application

Hello
I installed nextcloud on a server all is well
but in the mobil application ans computer application I have the domain name next to login
how to leave that the email address

My domain nextcloud.abc.fr
login login@abcdef.com
in applciaition I have login@abcdef.com@nextcloud.abc.fr

I’m sorry if I misunderstand your question:

As far as Nextcloud is concerned login@abd.com is your username so it should display as login@abd.com@nextcloud.abc.com

Are you using the IMAP authentication backend to login using your email address? If so you can hide the @abd.com

Thanks,
but it’s not for IMAP but I use local accounts and OpenLdap
for example

my website http: /nextcloud.aaaaaaaaa.fr
my login login@bbbbbbbbbbb.com
but on the app shows me login @ bbbbbbbbbbb.com @ nextcloud.aaaaaaaaa.fr