title: How to get security group list in cloudformation
body: <p>I want to get the list of security groups associated with a particular VPC in cloudformation parameter section.</p>
  
  <pre><code>    "VpcId":{
              "Description":"Choose the VPC ID"
              "Type":"AWS::EC2::VPC::Id"
          },
  "SecurityGroupsID":{
              "Description": "Choose availablity zone Availability Zone of the Subnet",
              "Type":"List&lt;AWS::EC2::SecurityGroup::Id&gt;"
              "AllowedValues":*******
          },
  </code></pre>
  
  <p>What should be the allowedvalues..?</p>