Changes to Fetch the user details for the currently authenticated user.

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 429

added the non-success response with the status 500

added the non-success response with the status 503

api operation id Users_Me removed and replaced with get-users-me