fix(login): fix crash with using resp before error check (#47)

cmd/login.go

@@ -88,16 +88,16 @@ func authenticate(c *cli.Context) error {
 	}
 
 	auth, resp, err := client.Authorization.Login(&req)
+	if err != nil {
+		return err
+	}
 
 	// If user hits an endpoint other than the
 	// Vela server that can't process request
 	// bomb out and throw error
 	if http.StatusUnauthorized < resp.StatusCode {
 		return fmt.Errorf("unable to process request")
 	}
-	if resp.StatusCode != http.StatusUnauthorized && err != nil {
-		return err
-	}
 
 	// retry authentication in case user requires an OTP code
 	switch resp.StatusCode {