Install LML Pro using Forge - Permission denied

[petermaas]

I've added the Composer Package Authentication details on my forge server but get the following error using Envoyer:

Using global Composer installation.
Installing dependencies from lock file (including require-dev)
Verifying lock file contents can be installed on current platform.
Package operations: 171 installs, 0 updates, 0 removals

• Downloading spatie/laravel-medialibrary-pro (2.6.1)
  0/1 [>---------------------------] 0% Failed to download spatie/laravel-medialibrary-pro from dist: The 'https://satis.spatie.be/dist/spatie/laravel-medialibrary-pro/spatie-laravel-medialibrary-pro-d99b87fad4ba06360a948391cfb1d978302c79f0-zip-241851.zip' URL required authentication (HTTP 401).
  You must be using the interactive console to authenticate
  Now trying to download from source
• Syncing spatie/laravel-medialibrary-pro (2.6.1) into cache

1/1 [============================] 100%
In Git.php line 471:

Failed to execute git clone --mirror -- '[email protected]:spatie/laravel-medi
alibrary-pro.git' '/home/forge/.cache/composer/vcs/git-github.com-spatie-la
ravel-medialibrary-pro.git/'

Cloning into bare repository '/home/forge/.cache/composer/vcs/git-github.co
m-spatie-laravel-medialibrary-pro.git'...
[email protected]: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

[parallels999]

Try to download manually the package

[petermaas]

I've found the solution: Adding the public SSH key of the server to my github account.