diff --git a/client_test.go b/client_test.go
index bfcd6b1..5de80f7 100644
--- a/client_test.go
+++ b/client_test.go
@@ -2,7 +2,6 @@ package paypal
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"math/rand"
 	"net/http"
@@ -46,38 +45,15 @@ func createRandomProduct(t *testing.T) Product {
 // test the Lock and Unlock methods of the private mutex field
 // of Client structure.
 func (c *Client) sendWithAuth(req *http.Request, v interface{}) error {
-	// c.Lock()
 	c.mu.Lock()
-	// Note: Here we do not want to `defer c.Unlock()` because we need `c.Send(...)`
-	// to happen outside of the locked section.
-
-	if c.mu.TryLock() {
-		// if the code is able to acquire a lock
-		// despite the mutex of c being locked, throw an error
-		err := errors.New("TryLock succeeded inside sendWithAuth with mutex locked")
-		return err
-	}
+	defer c.mu.Unlock()
+
 	if c.Token == nil || (!c.tokenExpiresAt.IsZero() && time.Until(c.tokenExpiresAt) < RequestNewTokenBeforeExpiresIn) {
-		// c.Token will be updated in GetAccessToken call
 		if _, err := c.GetAccessToken(req.Context()); err != nil {
-			// c.Unlock()
-			c.mu.Unlock()
 			return err
 		}
 	}
 	req.Header.Set("Authorization", "Bearer "+c.Token.Token)
-	// Unlock the client mutex before sending the request, this allows multiple requests
-	// to be in progress at the same time.
-	// c.Unlock()
-	c.mu.Unlock()
-
-	if !c.mu.TryLock() {
-		// if the code is unable to acquire a lock
-		// despite the mutex of c being unlocked, throw an error
-		err := errors.New("TryLock failed inside sendWithAuth with mutex unlocked")
-		return err
-	}
-	c.mu.Unlock() // undo changes from the previous TryLock
 
 	return c.Send(req, v)
 }
diff --git a/types.go b/types.go
index a8df203..7202d16 100644
--- a/types.go
+++ b/types.go
@@ -483,14 +483,13 @@ type (
 		Links            []Link                `json:"links,omitempty"`
 	}
 
-	// AuthorizeOrderResponse .
 	AuthorizeOrderResponse struct {
 		CreateTime    *time.Time             `json:"create_time,omitempty"`
 		UpdateTime    *time.Time             `json:"update_time,omitempty"`
 		ID            string                 `json:"id,omitempty"`
 		Status        string                 `json:"status,omitempty"`
 		Intent        string                 `json:"intent,omitempty"`
-		PurchaseUnits []PurchaseUnitRequest  `json:"purchase_units,omitempty"`
+		PurchaseUnits []PurchaseUnit         `json:"purchase_units,omitempty"`
 		Payer         *PayerWithNameAndPhone `json:"payer,omitempty"`
 	}
 
@@ -826,7 +825,6 @@ type (
 		Value    string `json:"value"`
 	}
 
-	// PurchaseUnit struct
 	PurchaseUnit struct {
 		ReferenceID        string              `json:"reference_id"`
 		Amount             *PurchaseUnitAmount `json:"amount,omitempty"`
@@ -944,7 +942,8 @@ type (
 
 	// CapturedPayments has the amounts for a captured order
 	CapturedPayments struct {
-		Captures []CaptureAmount `json:"captures,omitempty"`
+		Autthorizations []Authorization `json:"authorizations,omitempty"`
+		Captures        []CaptureAmount `json:"captures,omitempty"`
 	}
 
 	// CapturedPurchaseItem are items for a captured order