Sample request with `curl`:

```sh
curl -XPOST 'http://localhost:9001/?Action=AssumeRoleWithCustomToken&Version=2011-06-15&Token=aaa&RoleArn=arn:minio:iam:::role/idmp-vGxBdLkOc8mQPU1-UQbBh-yWWVQ'
```

Prettified Response:

```xml
<?xml version="1.0" encoding="UTF-8"?>
<AssumeRoleWithCustomTokenResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/">
  <AssumeRoleWithCustomTokenResult>
    <Credentials>

Create new canned policy file `getonly.json`. This policy enables users to download all objects under `my-bucketname`.

```json
cat > getonly.json << EOF
{
  "Version": "2012-10-17",
  "Statement": [
	{
	  "Action": [
		"s3:GetObject"
	  ],
	  "Effect": "Allow",
	  "Resource": [
		"arn:aws:s3:::my-bucketname/*"
	  ],
	  "Sid": ""
	}
  ]
}
EOF
```

```curl
curl -X POST --key private.key --cert public.crt "https://minio:9000?Action=AssumeRoleWithCertificate&Version=2011-06-15&DurationSeconds=3600"
```

```xml
<?xml version="1.0" encoding="UTF-8"?>
<AssumeRoleWithCertificateResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/">
   <AssumeRoleWithCertificateResult>
      <Credentials>
         <AccessKeyId>YC12ZBHUVW588BQAE5BM</AccessKeyId>

Create new canned policy file `adminManageUser.json`. This policy enables admin user to
manage other users.

```json
cat > adminManageUser.json << EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "admin:CreateUser",
        "admin:DeleteUser",
        "admin:ConfigUpdate"
      ],
      "Effect": "Allow",
      "Sid": ""
    },
    {

```
http://minio:9000/?Action=AssumeRole&DurationSeconds=3600&Version=2011-06-15&Policy={"Version":"2012-10-17","Statement":[{"Sid":"Stmt1","Effect":"Allow","Action":"s3:*","Resource":"arn:aws:s3:::*"}]}&AUTHPARAMS
```

## Sample Response

```
<?xml version="1.0" encoding="UTF-8"?>
<AssumeRoleResponse xmlns="https://sts.amazonaws.com/doc/2011-06-15/">
  <AssumeRoleResult>
    <AssumedRoleUser>
      <Arn/>

https://github.com/decred/dcrd/dcrec/secp256k1/v4
----------------------------------------------------------------
ISC License

Copyright (c) 2013-2017 The btcsuite developers
Copyright (c) 2015-2024 The Decred developers
Copyright (c) 2017 The Lightning Network Developers

Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above