c.Fatalf("Unable to attach policy: %v", err)
		}

		accessKeys[i] = accessKey
		secretKeys[i] = secretKey
	}

	g := errgroup.Group{}
	for i := range userCount {
		g.Go(func(i int) func() error {
			return func() error {
				uClient := s.getUserClient(c, accessKeys[i], secretKeys[i], "")
				err := s.adm.RemoveUser(ctx, accessKeys[i])
				if err != nil {
					return err
				}

	testCases := []struct {
		bucketName string
		accessKey  string
		secretKey  string
		// expected Response.
		expectedRespStatus int
	}{
		// Test case - 1.
		// Bucket exists.
		{
			bucketName:         bucketName,
			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusOK,
		},
		// Test case - 2.

			secretKey:          credentials.SecretKey,
			expectedRespStatus: http.StatusNotFound,
		},
		// Test case - 3.
		// Test case to induce a signature mismatch.
		// Using invalid accessID.
		{
			bucketName:         bucketName,
			objectName:         objectName,
			accessKey:          "Invalid-AccessID",
			secretKey:          credentials.SecretKey,

	// Create new HTTP request with incorrect secretKey to generate an incorrect signature.
	secretKey := s.secretKey + "a"
	request, err = newTestSignedRequest(http.MethodPut, getPutObjectURL(s.endPoint, bucketName, objName), 0, nil, s.accessKey, secretKey, s.signer)
	c.Assert(err, nil)
	response, err = s.client.Do(request)
	c.Assert(err, nil)

		signature string
		errCode   APIErrorCode
	}{
		{"invalidAccessKey", policy, calculateSignatureV2(policy, creds.SecretKey), ErrInvalidAccessKeyID},
		{creds.AccessKey, policy, calculateSignatureV2("random", creds.SecretKey), ErrSignatureDoesNotMatch},
		{creds.AccessKey, policy, calculateSignatureV2(policy, creds.SecretKey), ErrNone},
	}
	for i, test := range testCases {
		formValues := make(http.Header)

					AccessKey:    cred.AccessKey,
					SecretKey:    cred.SecretKey,
					SessionToken: cred.SessionToken,
					ParentUser:   cred.ParentUser,
				},
				UpdatedAt: updatedAt,
			}))

			mcreds = credentials.NewStaticV4(cred.AccessKey, cred.SecretKey, cred.SessionToken)
		} else {
			mcreds = credentials.NewStaticV4(sa.Credentials.AccessKey, sa.Credentials.SecretKey, "")
		}

	testCasesV2 := []struct {
		expectedStatus int
		secretKey      string
		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}},

	return nil
}

// Sign given request using Signature V2.
func signRequestV2(req *http.Request, accessKey, secretKey string) error {
	signer.SignV2(*req, accessKey, secretKey, false)
	return nil
}

// Sign given request using Signature V4.
func signRequestV4(req *http.Request, accessKey, secretKey string) error {
	// Get hashed payload.
	hashedPayload := req.Header.Get("x-amz-content-sha256")
	if hashedPayload == "" {

	}

	// 2. Create a user, associate policy and verify access
	accessKey, secretKey := mustGenerateCredentials(c)
	err = s.adm.SetUser(ctx, accessKey, secretKey, madmin.AccountEnabled)
	if err != nil {
		c.Fatalf("Unable to set user: %v", err)
	}
	// 2.1 check that user does not have any access to the bucket
	uClient := s.getUserClient(c, accessKey, secretKey, "")
	c.mustNotListObjects(ctx, uClient, bucket)

		STSCredential: &madmin.SRSTSCredential{
			AccessKey:    cred.AccessKey,
			SecretKey:    cred.SecretKey,
			SessionToken: cred.SessionToken,
			ParentUser:   cred.ParentUser,
		},
		UpdatedAt: updatedAt,
	}))

	return &ssh.Permissions{
		CriticalOptions: map[string]string{
			"AccessKey":    cred.AccessKey,
			"SecretKey":    cred.SecretKey,
			"SessionToken": cred.SessionToken,
		},