**To update a user pool client** This example updates the name of a user pool client. It also adds a writeable attribute "nickname". Command:: aws cognito-idp update-user-pool-client --user-pool-id us-west-2_aaaaaaaaa --client-id 3n4b5urk1ft4fl3mg5e62d9ado --client-name "NewClientName" --write-attributes "nickname" Output:: { "UserPoolClient": { "UserPoolId": "us-west-2_aaaaaaaaa", "ClientName": "NewClientName", "ClientId": "3n4b5urk1ft4fl3mg5e62d9ado", "LastModifiedDate": 1548802761.334, "CreationDate": 1548178931.258, "RefreshTokenValidity": 30, "WriteAttributes": [ "nickname" ], "AllowedOAuthFlowsUserPoolClient": false } }