R: Support for Secure API Key Management

# Support for Secure API Key Management

## Documentation for package ‘shelter’ version 0.2.1

- DESCRIPTION file
- Package NEWS
- Package README

## Help Pages

keyring_create | Create a new empty keyring.
keyring_delete | Delete a given keyring
keyring_exists | Check if a keyring exists.
keyring_list | Provides a 'data.frame' of information on available keyrings.
keyring_lock | Locks a given keyring
keyring_locked | Is a keyring unlocked for key operations and reading
keyring_unlock | Unlock a keyring.
key_delete | Delete a key from a keyring
key_exists | Does a given key exist in a keyring
key_get | Get a secret from a keyring.
key_list | Returns vector of keys in a keyring.
key_set | Set a key secret in a keyring
unlockKeys | Open an API key and use it build a connection.
unsafe_export | Export keyring to plain text format as a string.