generic after check conn return response nil, then we need check response

internal/interface/client/verification.go

@@ -54,8 +54,10 @@ func (receiver *VerificationClient) GetVerification(ctx context.Context, token,
 		},
 	})
 	if err != nil {
+		if response != nil {
 			if response.StatusCode == 404 {
-			return &models.Verification{},nil
+				return &models.Verification{}, nil
+			}
 		}
 		return nil, errors.New(err, errors.ErrInternalError)
 	}