name : create-environment-membership.rst **To add an environment member to an AWS Cloud9 development environment** This example adds the specified environment member to the specified AWS Cloud9 development environment. Command:: aws cloud9 create-environment-membership --environment-id 8a34f51ce1e04a08882f1e811bd706EX --user-arn arn:aws:iam::123456789012:user/AnotherDemoUser --permissions read-write Output:: { "membership": { "environmentId": "8a34f51ce1e04a08882f1e811bd706EX", "userId": "AIDAJ3LOROMOUXTBSU6EX", "userArn": "arn:aws:iam::123456789012:user/AnotherDemoUser", "permissions": "read-write" } }