vagrant で Error: SSL certificate problem が出た時の対処法

vagrant up ってしたときに、こんなの出てきた


The box 'bento/centos-6.7' could not be found or
could not be accessed in the remote catalog. If this is a private
box on HashiCorp's Atlas, please verify you're logged in via
`vagrant login`. Also, please double-check the name. The expanded
URL and error message are shown below:

URL: [""]
Error: SSL certificate problem: unable to get local issuer certificate
More details here:

curl performs SSL certificate verification by default, using a "bundle"
of Certificate Authority (CA) public keys (CA certs). If the default
bundle file isn't adequate, you can specify an alternate file
using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
the bundle, the certificate verification probably failed due to a
problem with the certificate (it might be expired, or the name might
not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
the -k (or --insecure) option.





 config.vm.box_download_insecure = true

 これを、Vagrantfile 内、 の下あたりに入れるといける