SMQ-3415 - Return correct error in auth gRPC response (#3416)

Signed-off-by: Arvindh <arvindh91@gmail.com>

auth/service.go

@@ -331,7 +331,7 @@ func (svc service) invitationKey(ctx context.Context, key Key) (Token, error) {
 func (svc service) refreshKey(ctx context.Context, token string, key Key) (Token, error) {
 	k, err := svc.tokenizer.Parse(ctx, token)
 	if err != nil {
-		return Token{}, errors.Wrap(errRetrieve, err)
+		return Token{}, errors.Wrap(svcerr.ErrAuthentication, err)
 	}
 	if k.Type != RefreshKey {
 		return Token{}, errIssueUser

auth/tokenizer/symmetric/tokenizer.go

@@ -9,7 +9,6 @@ import (
 	"github.com/absmach/magistrala/auth"
 	smqjwt "github.com/absmach/magistrala/auth/tokenizer/util"
 	"github.com/absmach/magistrala/pkg/errors"
-	svcerr "github.com/absmach/magistrala/pkg/errors/service"
 	"github.com/lestrrat-go/jwx/v2/jwa"
 	"github.com/lestrrat-go/jwx/v2/jwt"
 )
@@ -61,9 +60,9 @@ func (tok *tokenizer) Parse(ctx context.Context, tokenString string) (auth.Key,
 	)
 	if err != nil {
 		if errors.Contains(err, smqjwt.ErrJWTExpiryKey) {
-			return auth.Key{}, errors.Wrap(svcerr.ErrAuthentication, auth.ErrExpiry)
+			return auth.Key{}, auth.ErrExpiry
 		}
-		return auth.Key{}, errors.Wrap(svcerr.ErrAuthentication, err)
+		return auth.Key{}, err
 	}
 
 	if tkn.Issuer() != smqjwt.IssuerName {