linter fixes

pkg/api/client/client.go

@@ -7,19 +7,16 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/http/httputil"
 	"os"
 	"strconv"
 	"strings"
-	"sync"
 	"time"
 )
 
 type Client struct {
-	sync.Mutex
 	endpoint    string
 	username    string
 	password    string
@@ -193,13 +190,13 @@ func (c *Client) Do(r *http.Request, v interface{}) (resp *http.Response, err er
 	if err != nil {
 		return
 	}
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		resp.Body.Close()
 		return
 	}
 	resp.Body.Close()
-	resp.Body = ioutil.NopCloser(bytes.NewReader(body))
+	resp.Body = io.NopCloser(bytes.NewReader(body))
 
 	if c.debugWriter != nil {
 		dumpResp, err := httputil.DumpResponse(resp, true)

pkg/api/client/helper.go

@@ -14,6 +14,10 @@ func (e Error) Error() string {
 	return e.Err
 }
 
+func (e Error) Is(target error) bool {
+	return e.Err == target.Error()
+}
+
 func decodeResp(resp *http.Response, v interface{}) error {
 	if resp.Body == nil {
 		return nil