How to install git credential manager core on Ubuntu 22.04 / 20.04

Download the GCM

wget "https://github.com/git-ecosystem/git-credential-manager/releases/download/v2.5.0/gcm-linux_amd64.2.5.0.deb" -O /tmp/gcmcore.deb

Execute the installable file
```
sudo dpkg -i /tmp/gcmcore.deb
```
Configure GCM
```
git-credential-manager configure
```

Configure the GCM store

git config --global credential.credentialStore plaintext

or

export GCM_CREDENTIAL_STORE=plaintext