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ApsaraMQ for MQTT:UpdateCustomAuthIdentity

Last Updated:Aug 27, 2026

Updates custom identity authentication information.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

mq:UpdateCustomAuthIdentity

update

*Instance

acs:mq:{#regionId}:{#accountId}:{#InstanceId}

None None

Request parameters

Parameter

Type

Required

Description

Example

InstanceId

string

Yes

The ID of the ApsaraMQ for MQTT instance.

post-111****

Username

string

Yes

The username. Maximum length: 64 characters.

test

Secret

string

Yes

The AccessKey secret.

xxxx

IdentityType

string

Yes

The identity type. Valid values:

  • USER

  • CLIENT

USER

ClientId

string

No

The client ID. Required when IdentityType is set to CLIENT.

GID_test@@@test

SignMode

string

Yes

The signature verification mode. ORIGIN: compares the password directly with the AccessKey secret. SIGNED: signs the client ID with HMAC_SHA1 to generate a password for comparison.

SIGNED

Response elements

Element

Type

Description

Example

object

The response parameters.

RequestId

string

The request ID.

3F00084A-7F07-4B15-BADA-8903A4FB****

Code

integer

The HTTP status code.

200

Success

boolean

Whether the request was successful.

True

Message

string

The response message.

operation success.

Examples

Success response

JSON format

{
  "RequestId": "3F00084A-7F07-4B15-BADA-8903A4FB****",
  "Code": 200,
  "Success": true,
  "Message": "operation success."
}

Error codes

HTTP status code

Error code

Error message

Description

400 InstancePermissionCheckFailed Instance permission validation failed. Verify the instance owner account and its permission settings.
400 InvalidParameter.%s Parameter validation failed. The parameter may be missing or invalid.
404 ApiNotSupport The specified API is not supported.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.