Expose auth validator functionality for wrapper (#416)

* expose auth validator functionality for wrapper

* Add REST validation after keys set, package account types for future syncing

* Add transient error checking for initial creddemtial validation

* fix command types

* Addressed nits from glorious person

* Amalgamate body within error when not between 2xx status, added btcmarket specific auth error check

* nit fix for glorious person

* Format fix

* removed unused code

* check transient first then validate if its an exchange specific authentication error, all others will be disregarded

* Addressed glorious nits

* Addressed glorious nits

* Moved account processing to updateaccountinfo func and added in fetch account info

* Add GRPC Account streaming (NOTE: could not complete until sync item added)

* RM exchange check

* Address xtda nits

* RM comment code

* Fix linter issues

* used most recent protoc version

* lbank linter issues fixed

* Addressed nits and changed len check to range in for loops

* Fixed timeout issue

* thrasher nits addressed

* add string holdings

exchanges/request/request.go

@@ -302,14 +302,11 @@ func (r *Requester) DoRequest(req *http.Request, path string, body io.Reader, re
 			}
 		}
 
-		if resp.StatusCode != 200 && resp.StatusCode != 201 && resp.StatusCode != 202 {
-			err = fmt.Errorf("unsuccessful HTTP status code: %d", resp.StatusCode)
-			if verbose {
-				err = fmt.Errorf("%s\n%s", err.Error(),
-					fmt.Sprintf("%s exchange raw response: %s", r.Name, string(contents)))
-			}
-
-			return err
+		if resp.StatusCode < http.StatusOK ||
+			resp.StatusCode > http.StatusAccepted {
+			return fmt.Errorf("unsuccessful HTTP status code: %d body: %s",
+				resp.StatusCode,
+				string(contents))
 		}
 
 		if httpDebug {