error ssh login using key pairs between pfsense box

[luisenrique]

i have 2 pfsense box i need to automate the copy of my acme certificates generated in one of them to another and run some commans in a second pfsense so i need to login without user password input,
i readed https://forum.netgate.com/topic/47107/ssh-key-exchange post and make key pairs in the pfsense client ssh , created user in the other and paste the public key ....so i get this error...
Jan 23 16:19:32 sshd 88943 fatal: Access denied for user CertCopier by PAM account configuration [preauth]
Jan 23 16:19:32 sshd 88943 user CertCopier login class [preauth]

thanks and sorry my english