Cloning repo azure devops error / ssh no key found

[Grim4ldius]

Hi
I'm new to semaphore and linux, and i need some help to use azure devops repo with semaphore

I have a simple task that ping my hosts but when i execute my task on semaphore a can't get it from the repo
( this work fine on git hub)

I have the ssh key in the repos and can connect to it with ssh -T git@ssh.dev.azure.com
(for the semaphore and ansible user)

2:29:15 PM Task 2147483563 added to queue
2:29:20 PM Started: 2147483563
2:29:20 PM Run TaskRunner with template: Ping SSH ADO
2:29:20 PM Preparing: 2147483563
2:29:20 PM Cloning Repository git@ssh.dev.azure.com:v3/myproject/Infrastructure/Ansible
2:29:20 PM Unable to creating ssh auth method
2:29:20 PM Failed updating repository: ssh: no key found
2:29:20 PM Running playbook failed: ssh: no key found

I'm pretty sure i have made a mistake but i don't know where
Can someone help me please ?