changed verbose to false in readme; only issue netrc warning if initializing to private cluster

Author: jpswinski

README.md

@@ -33,7 +33,7 @@ Example usage:
 from sliderule import icesat2
 
 # initialize
-icesat2.init("slideruleearth.io", verbose=True)
+icesat2.init("slideruleearth.io", verbose=False)
 
 # region of interest
 region = [ {"lon":-105.82971551223244, "lat": 39.81983728534918},

sliderule/sliderule.py

@@ -690,7 +690,8 @@ def authenticate (ps_organization, ps_username=None, ps_password=None):
             ps_username = login_credentials[0]
             ps_password = login_credentials[2]
         except Exception as e:
-            logger.warning("Failed to retrieve username and password from netrc file: {}".format(e))
+            if ps_organization != PUBLIC_ORG:
+                logger.warning("Unable to retrieve username and password from netrc file for machine: {}".format(e))
 
     # authenticate to provisioning system
     if ps_username and ps_password: