participants found that the environment variable values for "DevNet Sandbox RESTCONF Always On" was empty after importing collections and enviroment .json files from /code/dnav3-code/postman.
Please add clarity to lab 3, informing the participants to import and overwrite the "DevNet Sandbox RESTCONF Always On" environment from /code/dnav3-code/intro-mdp/postman as this has the requisite values populated for the variables.