def renew(id, increment = 0)
      json = client.put("/v1/sys/renew/#{id}", JSON.fast_generate(
        increment: increment,
      ))
      return Secret.decode(json)
    end
def renew(id, increment = 0)
      json = client.put("/v1/sys/renew/#{id}", JSON.fast_generate(
        increment: increment,
      ))
      return Secret.decode(json)
    end
Renew a lease with the given ID.

 @example
   Vault.sys.renew("aws/username") #=> #<Vault::Secret ...>

 @param [String] id
   the lease ID
 @param [Fixnum] increment

 @return [Secret]