Problem with gitlab-runner?

Question

GitLab

I create .gitlab-ci.yml I write
something like this in it:

stages:
    - deploy_remote_prod

deploy_remote_prod:
   stage: deploy_remote_prod
   only:
      - master
   tags:
      - my-production-runner
   script:
      - ssh -i /srv/gitlab-runner/config/keys/some.key [email protected] '<run some command> || true'

For the repository I use ssh-runner
Kommich - I get the result:

Running with gitlab-runner 10.7.2 (b5e03c94)
  on dev runner 076f0431
Using SSH executor...
Running on dev_server_someserver via 14b41f4da93f...
Cloning repository...
Cloning into 'builds/076f0431/0/user/SomeRepo'...
remote: You are not allowed to download code from this project.
fatal: unable to access 'http://gitlab-ci-token:[email protected]/user/SomeRepo.git/': The requested URL returned error: 403
ERROR: Job failed: Process exited with: 1. Reason was:  ()

First - where does he get this url from?
http://gitlab-ci-token:[email protected]
if I need, for example, to get the runner from git://[email protected]:user/SomeRepo.git ?
Secondly - where should he register the key so that the runner can pull off the build without problems?