Error with git commit signing: Permission denied (publickey)

FC5570 · March 23

Hello.

I have followed all the steps on https://developer.1password.com/docs/ssh/git-commit-signing
When I try to run ssh -T git@github.com I get the following error: git@github.com: Permission denied (publickey).

This is the output of ssh -vT git@github.com:

OpenSSH_for_Windows_9.5p1, LibreSSL 3.8.2
debug1: Connecting to github.com [20.207.73.82] port 22.
debug1: Connection established.
debug1: identity file C:\\Users\\user/.ssh/id_rsa type -1
debug1: identity file C:\\Users\\user/.ssh/id_rsa-cert type -1
debug1: identity file C:\\Users\\user/.ssh/id_ecdsa type -1
debug1: identity file C:\\Users\\user/.ssh/id_ecdsa-cert type -1
debug1: identity file C:\\Users\\user/.ssh/id_ecdsa_sk type -1
debug1: identity file C:\\Users\\user/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file C:\\Users\\user/.ssh/id_ed25519 type -1
debug1: identity file C:\\Users\\user/.ssh/id_ed25519-cert type -1
debug1: identity file C:\\Users\\user/.ssh/id_ed25519_sk type -1
debug1: identity file C:\\Users\\user/.ssh/id_ed25519_sk-cert type -1
debug1: identity file C:\\Users\\user/.ssh/id_xmss type -1
debug1: identity file C:\\Users\\user/.ssh/id_xmss-cert type -1
debug1: identity file C:\\Users\\user/.ssh/id_dsa type -1
debug1: identity file C:\\Users\\user/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_9.5
debug1: Remote protocol version 2.0, remote software version babeld-05989c77
debug1: compat_banner: no match: babeld-05989c77
debug1: Authenticating to github.com:22 as 'git'
debug1: load_hostkeys: fopen C:\\Users\\user/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\\ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\\ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU
debug1: load_hostkeys: fopen C:\\Users\\user/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\\ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen __PROGRAMDATA__\\ssh/ssh_known_hosts2: No such file or directory
debug1: Host 'github.com' is known and matches the ED25519 host key.
debug1: Found key in C:\\Users\\user/.ssh/known_hosts:1
debug1: ssh_packet_send2_wrapped: resetting send seqnr 3
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: ssh_packet_read_poll2: resetting read seqnr 3
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: get_agent_identities: agent returned 1 keys
debug1: Will attempt key: GitHub Signing Key ED25519 SHA256:BfAWc70z9oiBmtGIBKHkiSRPJrGcx658s8RR3aLGHEo agent
debug1: Will attempt key: C:\\Users\\user/.ssh/id_rsa
debug1: Will attempt key: C:\\Users\\user/.ssh/id_ecdsa
debug1: Will attempt key: C:\\Users\\user/.ssh/id_ecdsa_sk
debug1: Will attempt key: C:\\Users\\user/.ssh/id_ed25519
debug1: Will attempt key: C:\\Users\\user/.ssh/id_ed25519_sk
debug1: Will attempt key: C:\\Users\\user/.ssh/id_xmss
debug1: Will attempt key: C:\\Users\\user/.ssh/id_dsa
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,sk-ssh-ed25519-cert-v01@openssh.com,sk-ecdsa-sha2-nistp256-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,sk-ssh-ed25519@openssh.com,sk-ecdsa-sha2-nistp256@openssh.com,ssh-ed25519,ecdsa-sha2-nistp521,ecdsa-sha2-nistp384,ecdsa-sha2-nistp256,rsa-sha2-512,rsa-sha2-256,ssh-rsa>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: GitHub Signing Key ED25519 SHA256:BfAWc70z9oiBmtGIBKHkiSRPJrGcx658s8RR3aLGHEo agent
debug1: Authentications that can continue: publickey
debug1: Trying private key: C:\\Users\\user/.ssh/id_rsa
debug1: Trying private key: C:\\Users\\user/.ssh/id_ecdsa
debug1: Trying private key: C:\\Users\\user/.ssh/id_ecdsa_sk
debug1: Trying private key: C:\\Users\\user/.ssh/id_ed25519
debug1: Trying private key: C:\\Users\\user/.ssh/id_ed25519_sk
debug1: Trying private key: C:\\Users\\user/.ssh/id_xmss
debug1: Trying private key: C:\\Users\\user/.ssh/id_dsa
debug1: No more authentication methods to try.
git@github.com: Permission denied (publickey).

I have disabled the OpenSSH Authentication Agent in services:

These are my 1password settings:

Please help me. Thank you.

1Password Version: 8.10.28 (81028034)
Extension Version: 2.21.0 (22100001, on STABLE channel)
OS Version: Windows 11 Home Insider Preview (Dev Channel)
Browser: Vivaldi