fixed the key and got it woking

config-add-sshkey.yaml

@@ -1,6 +1,6 @@
 ---
 - name: Add ssh key
-  hosts: "killer1"
+  hosts: all
   become: true
 
   tasks:
@@ -12,7 +12,7 @@
       ansible.posix.authorized_key:
         user: "{{ lookup('env', 'USER') }}"
         state: present
-        key: "/root/.ssh/id_rsa.pub"
+        key: "{{ lookup('file', '~/.ssh/id_rsa.pub') }}"
 
     - name: Change sudoers file
       ansible.builtin.lineinfile: