Procedure

1. Create environment variables. On the homepage of Postman, click the environment variable management button (the gear icon in the following figure). Create a group of variables named huaweicloud.com. The keys must contain a least username, password, domain_username, and project_id. Then, set the values. You can obtain the values from My Credentials page on the web console.
   Figure 1 Environment variable management
   
   Figure 2 Setting environment variable values
   
   

   The variables in the preceding figure can be found from the My Credentials page on the web console. The following table lists the mapping between attributes on the web console and variables.

   Table 1 Variables

   Variable	Description
   username	Username
   password	Password
   tenant_id	User ID
   domain_username	Account name
   domain_id	Account ID
   project_id	Project ID
   region	Region
   X-Auth-Token	Tenant's token

2. Set the request body.

   

   Select the raw format and select JSON (application/json) on the right.

   

   For details, see the Identity and Access Management API Reference.

3. Send the request.

   Enter the requested URL in the address box. Send the request to the public IAM backend address of all sites, and add the URI (/v3/auth/tokens) to it.

   Select the POST request method and click Send. If the preceding information is correct, a response similar to the following is displayed.

   

   On the Headers page, the value of x-subject-token is the token required for sending the request.

   

   When calling ELB APIs, add the X-Auth-Token field to the request header and set its value to the obtained token. If 401 Unauthorized is returned, check whether the information in the request body is correct.

Sample Code

Request body in 2

{
    "auth": {
        "identity": {
            "methods": [
                "password"
            ],
            "password": {
                "user": {
                    "name": "{{username}}",
                    "password": "{{password}}",
                    "domain": {
                        "name": "{{domain_username}}"
                    }
                }
            }
        },
        "scope": {
            "project": {
                "id": "{{project_id}}"
            }
        }
    }
}

In the request body, fields in {{ }} are reference variables.