Describes the cause and action for error messages.
Error Message(English)：
secret key not available
git commit signing failed: secret key not available - Stack Overflow
https://stackoverflow.com/questions/36810467/git-commit-signing-failed-secret-key-not-available
Skipped "XXX": secret key not available
https://stackoverflow.com/questions/50309704/skipped-xxx-secret-key-not-available
gpg: skipped "N": secret key not available
https://stackoverflow.com/questions/42117385/gpg-skipped-n-secret-key-not-available
gpg: skipped "XXBDXX4E": secret key not available. gpg ...
https://stackoverflow.com/questions/37780976/gpg-skipped-xxbdxx4e-secret-key-not-available-gpg-signi・・・
Generating a GPG key for git tagging
https://stackoverflow.com/questions/12061645/generating-a-gpg-key-for-git-tagging
gpg: skipped "N": secret key not available - Stack Overflow
https://stackoverflow.com/questions/42117385/gpg-skipped-n-secret-key-not-available?rq=1
Update the docs for GPG for gpg2 - [secret key not available] (#36859 ...
https://gitlab.com/gitlab-org/gitlab-ce/issues/36859
Signing Git commit with GPG ask passphrase everytime ・ Issue #4665 ...
https://github.com/fish-shell/fish-shell/issues/4665
gpg secret key not found ・ Issue #7 ・ passbolt/passbolt_cli ・ GitHub
https://github.com/passbolt/passbolt_cli/issues/7