read:ssh_signing_key scope to use this endpoint.curl --location 'https://service1.exmaple.com/user/ssh_signing_keys/'{
"key": "2Sg8iYjAxxmI2LvUXpJjkYrMxURPc8r+dB7TJyvv1234",
"id": 2,
"url": "https://api.github.com/user/keys/2",
"title": "ssh-rsa AAAAB3NzaC1yc2EAAA",
"created_at": "2020-06-11T21:31:57Z"
}