Changes to Retrieve an environment variable

added the optional property errorCode to the response with the 400 status

added the optional property errorCode to the response with the 401 status

added the optional property errorCode to the response with the 403 status

added the optional property errorCode to the response with the 404 status

added the optional property errorCode to the response with the 429 status

for the path request parameter key, the minLength was increased from 0 to 1

for the header request parameter x-checkly-account, the format changed from no format to uuid

the response property value became nullable for the status 200

removed the optional property attributes from the response with the 401 status

removed the optional property attributes from the response with the 429 status

added the non-success response with the status 400

the response property locked became required for the status 200

the response property message became required for the status 401

the response property message became required for the status 403

the response property message became required for the status 404

the response property message became required for the status 429

the response property secret became required for the status 200

the locked response's property default value false was removed for the status 200

the secret response's property default value false was removed for the status 200

removed the 401.00 enum value from the statusCode response property for the response status 401

removed the 403.00 enum value from the statusCode response property for the response status 403

removed the 404.00 enum value from the statusCode response property for the response status 404

removed the 429.00 enum value from the statusCode response property for the response status 429

removed the Forbidden enum value from the error response property for the response status 403

removed the Not Found enum value from the error response property for the response status 404

removed the Too Many Requests enum value from the error response property for the response status 429

removed the Unauthorized enum value from the error response property for the response status 401