Add Vagrant Cloud account

Vagrant Cloud has been used for years by arch-boxes[1] for publishing
Vagrant boxes. Access to the organization[2] was handed out to a few
members of the DevOps team and the creator of the organization
(arch-boxes maintainer at the time).

With this commit the control of the organization is handed over to the
DevOps team through a new Vagrant Cloud account.

[1] https://gitlab.archlinux.org/archlinux/arch-boxes
[2] https://app.vagrantup.com/archlinux/

docs/otp.md

@@ -63,6 +63,19 @@ You can then run
 
 to generate a token to log in.
 
+## Vagrant Cloud
+
+Run
+
+    pass otp insert -i VagrantCloud -a archlinux VagrantCloud/archlinux-master-token -s
+
+When asked for a secret, provide the `vagrant_cloud_seed` from `misc/vaults/vault_vagrant_cloud.yml`.
+You can then run
+
+    pass otp code VagrantCloud/archlinux-master-token
+
+to generate a token to log in.
+
 ### Adding your own account
 
 Hetzner supports multiple 2FA devices at once which allows you to add your own 2FA app of choice

misc/vaults/vault_vagrant_cloud.yml

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