### Description Create an API endpoint that returns a single SSH key for a given user. Parameters: `id` - ID of specified user (integer, required) `key_id` - SSH key ID (integer, required) ### Background This is an issue to capture the following MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/81790 The main driver for this is to implement a proper and easy to maintain resource in the [GitLab terraform provider](https://github.com/gitlabhq/terraform-provider-gitlab). This this enables GitLab SSH keys to be a Terraform-managed resource.