salt auth error setup

master.conf

auto_accept: True
log_level: debug
log_file: /var/log/salt/master

master_minion.conf

id: master_minion
master: localhost

minion.conf

id: minion
master: 10.10.10.2

Vagrantfile

Vagrant.configure("2") do |config|
  config.vm.box = "hashicorp/precise64"

  config.vm.define "master" do |master|
    master.vm.hostname = "master"
    master.vm.network :private_network, ip: "10.10.10.2"
    master.vm.synced_folder ".", "/srv/salt/", nfs: true

    master.vm.provider "virtualbox" do |v|
      v.cpus = 2
      v.memory = 1024
    end

    master.vm.provision :salt do |salt|
      salt.colorize = true
      salt.log_level = "debug"
      salt.install_type = "git"
      salt.install_args = "v2014.7"
      salt.install_master = true
      salt.master_config = "master.conf"
      salt.minion_config = "master_minion.conf"
    end
  end

  config.vm.define "minion" do |minion|
    minion.vm.hostname = "minion"
    minion.vm.network :private_network, ip: "10.10.10.3"

    minion.vm.provider "virtualbox" do |v|
      v.cpus = 2
      v.memory = 1024
    end

    minion.vm.provision :salt do |salt|
      salt.colorize = true
      salt.log_level = "debug"
      salt.install_type = "git"
      salt.install_args = "v2014.7"
      salt.minion_config = "minion"
    end
  end
end