DefaultSecretKey = "minioadmin"
)

// Default access credentials
var (
	DefaultCredentials = Credentials{
		AccessKey: DefaultAccessKey,
		SecretKey: DefaultSecretKey,
	}
)

// claim key found in credentials which are service accounts
const iamPolicyClaimNameSA = "sa-policy"

const (
	// AccountOn indicates that credentials are enabled
	AccountOn = "on"

		ccred          Credentials
		expectedResult bool
	}{
		// Same Credentialss.
		{cred, cred, true},
		// Empty credentials to compare.
		{cred, Credentials{}, false},
		// Empty credentials.
		{Credentials{}, cred, false},
		// Two different credentialss
		{cred, cred2, false},
		// Access key is different in credentials to compare.
		{cred, Credentials{AccessKey: "myuser", SecretKey: cred.SecretKey}, false},

		formData       map[string]string
	}{
		{http.StatusForbidden, credentials.SecretKey, map[string]string{"AWSAccessKeyId": "invalidaccesskey"}},
		{http.StatusForbidden, "invalidsecretkey", map[string]string{"AWSAccessKeyId": credentials.AccessKey}},
		{http.StatusNoContent, credentials.SecretKey, map[string]string{"AWSAccessKeyId": credentials.AccessKey}},
		{http.StatusForbidden, credentials.SecretKey, map[string]string{"Awsaccesskeyid": "invalidaccesskey"}},

}
```

These credentials can now be used to perform MinIO API operations, these credentials automatically expire in 1hr. To understand more about credential expiry duration and client grants STS API read further [here](https://github.com/minio/minio/blob/master/docs/sts/client-grants.md).

## Explore Further

			objectName:         objectName,
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusOK,
		},
		// Test case - 2.
		// Case with non-existent object name.
		{
			bucketName:         bucketName,
			objectName:         "abcd",
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusNotFound,

		// x-amz-security-token should not present for static credentials.
		return nil, ErrInvalidToken
	}

	if !cred.IsServiceAccount() && cred.IsTemp() && subtle.ConstantTimeCompare([]byte(token), []byte(cred.SessionToken)) != 1 {
		// validate token for temporary credentials only.
		return nil, ErrInvalidToken
	}

	// Expired credentials must return error right away.
	if cred.IsTemp() && cred.IsExpired() {

- MinIO returns temp. S3 credentials associated to the found policy.

The returned credentials expiry after a certain period of time that can be configured via `&DurationSeconds=3600`. By default, the STS credentials are valid for 1 hour. The minimum expiration allowed is 15 minutes.

		return auth.Credentials{}, s3Err
	}

	// Temporary credentials or Service accounts cannot generate further temporary credentials.
	if user.IsTemp() || user.IsServiceAccount() {
		return auth.Credentials{}, ErrAccessDenied
	}

	// Session tokens are not allowed in STS AssumeRole requests.
	if getSessionToken(r) != "" {
		return auth.Credentials{}, ErrAccessDenied
	}

	return user, ErrNone
}

		{
			bucketName:         bucketName,
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusOK,
		},
		// Test case - 2.
		// Non-existent bucket name.
		{
			bucketName:         "2333",
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusNotFound,
		},

		return nil, errors.New("AWS Role cannot be activated with static credentials or the web identity token file")
	case conf.Bucket == "":
		return nil, errors.New("no bucket name was provided")
	}

	// Credentials initialization
	var creds *credentials.Credentials
	switch {
	case conf.AWSRole:
		creds = credentials.New(&credentials.IAM{
			Client: &http.Client{
				Transport: NewHTTPTransport(),
			},