SSH Key Requirement for Submodule Cloning

[jesnk]

Hello, Oier Mees
I am a doctoral student Currently engaged in related research,
and I have been deeply impressed by your work.

I am currently try to cloning the hulc2 repository and its submodules.
During the cloning process, I encountered a requirement for SSH authentication when attempting to clone the submodules. The system is asking for the passphrase of my SSH key (id_rsa).

Could you please check if the submodule is intended to be private and if SSH authentication is necessary?
It seems like submodule repositories are on public state, But I don't know why the message appearing.

Below is terminal outputs when try to cloning repo.

==============================================
(hulc) root@8c3dd662bc05: git clone --recurse-submodules https://github.com/mees/hulc2.git
Cloning into 'hulc2'...
remote: Enumerating objects: 480, done.
remote: Counting objects: 100% (258/258), done.
remote: Compressing objects: 100% (238/238), done.
remote: Total 480 (delta 56), reused 62 (delta 17), pack-reused 222
Receiving objects: 100% (480/480), 17.38 MiB | 14.84 MiB/s, done.
Resolving deltas: 100% (86/86), done.
Submodule 'LangAnnotationApp' (git@github.com:mees/LanguageAnnotationWebApp.git) registered for path 'LangAnnotationApp'
Submodule 'calvin_env' (git@github.com:JessicaBorja/calvin_env.git) registered for path 'calvin_env'
Submodule 'r3m' (git@github.com:mees/r3m.git) registered for path 'r3m'
Submodule 'robot_io' (git@github.com:mees/robot_io.git) registered for path 'robot_io'
Cloning into '/research/tes/hulc2/LangAnnotationApp'...
Enter passphrase for key '/root/.ssh/id_rsa':