Cognito.UserPoolGroupsee http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cognito-userpoolgroup.html
type properties = {group_name : string option;description : string option;user_pool_id : string;precedence : int option;role_arn : string option;}see http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cognito-userpoolgroup.html;
val make_properties :
?group_name:string ->
?description:string ->
user_pool_id:string ->
?precedence:int ->
?role_arn:string ->
unit ->
propertiesval yojson_of_properties :
properties ->
[> `Assoc of (string * Yojson.Safe.t) list ]val create_attributes : string -> attributes