Error when checking out a repository with private submodules

[BSanchidrian]

Hello everyone,

I've tried to implement a basic dotnet build action on a github repository that contains one submodule which its a private repository itself.

git submodule sync
git -c http.https://github.com.extraheader="AUTHORIZATION: basic ***" submodule update --init --force
Submodule 'libs/PrivateRepo' (git@github.com:BSanchidrian/PrivateRepo.git) registered for path 'libs/PrivateRepo'
Cloning into '/home/runner/work/TestProject/libs/PrivateRepo'...
Host key verification failed.
##[error]fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
##[error]fatal: clone of 'git@github.com:BSanchidrian/PrivateRepo.git' into submodule path '/home/runner/work/TestProject/libs/PrivateRepo' failed
Failed to clone 'libs/PrivateRepo'. Retry scheduled
Cloning into '/home/runner/work/TestProject/libs/PrivateRepo'...
Host key verification failed.
##[error]fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
##[error]fatal: clone of 'git@github.com:BSanchidrian/PrivateRepo.git' into submodule path '/home/runner/work/TestProject/libs/PrivateRepo' failed
Failed to clone 'libs/PrivateRepo' a second time, aborting
Removed matchers: 'checkout-git'
##[remove-matcher owner=checkout-git]
##[error]Git submodule update failed with exit code: 1
##[error]Exit code 1 returned from process: file name '/home/runner/runners/2.157.3/bin/Runner.PluginHost', arguments 'action "GitHub.Runner.Plugins.Repository.CheckoutTask, Runner.Plugins"'.

[wundo]

Same here

[rectalogic]

See #14

[BSanchidrian]

See #14

Thank you, for some reason I couldn't find that thread. I'll close this for now.