You now need to add the repository SSH key to any of the main repository hosts, on which your code repository of the project is hosted.
To add repository SSH key, Login to Github, Click on Settings > Click on SSH and GPG Keys on Left side menu > Click on New SSH Key
Provide the title that can be memorize and paste the copied key from Projects in Key box.
To add repository SSH key, Login to Gitea, Click on Settings > Go to SSH/GPG Keys > Click on Add Key
Provide the name and paste the copied key from Projects in content box.