Create an environment

Creates an environment. **Note:** - The request body size cannot exceed the maximum allowed size of 30MB. - If you receive an HTTP `411 Length Required` error response, manually pass the `Content-Length` header and its value in the request header. - If you do not include the `workspace` query parameter, the system creates the environment in the oldest personal Internal workspace you own. - Only [shared variable](https://learning.postman.com/docs/use/send-requests/variables/variables/#share-variable-values) values can be modified through the Postman API. A shared variable is an environment variable with its value synced and stored in the Postman cloud, and can be accessed by your teammates in the environment's workspace.