Unable to manually install plugin
**Description**
I am trying to install a specific fork of a plugin using the HOOBS cli per https://support.hoobs.org/docs/60e0d1a2646faaa152f10ddb

**Expected behavoir**
The plugin should be installed.

**Plugin name**
https://github.com/dacarson/homebridge-weather-plus/

```
$ sudo hbs plugin add github:dacarson/homebridge-weather-plus -b weather
[sudo] password for hoobs:
yarn add v1.22.18
[1/4] Resolving packages...
error Command failed.
Exit code: 128
Command: git
Arguments: ls-remote --tags --heads ssh://git@github.com/dacarson/homebridge-weather-plus@latest.git
Directory: /var/lib/hoobs/weather
Output:
Warning: Permanently added the RSA host key for IP address '140.82.113.3' to the list of known hosts.
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.
 WARNING  no plugins installed
```


**Please report the issue to the plugin developer**
We like to help the community, however some issues are out of our control. Please report this to the plugin developer and include a link here.

**Version**
4.3.0

**Did you upgrade**
Please let us know if you upgraded from a previous version.
- [X] No

**What device are you using?**
Please let us know the device you are running HOOBS on.
- [X] HOOBS SD Card
