work without singularity

sshshare/__main__.py

@@ -125,8 +125,13 @@ def parse_expiry(expiry):
 def make_link(args):
     ### TODO ###
     ### Get these from the config ###
-    singularity = config['singularity']
-    img = config['img']
+
+    try:
+      singularity = config['singularity']
+      img = config['img']
+    except KeyError as e:
+      singularity=None
+      img=None
     if not ca_setup():
         initialise_ca()
     import appdirs