include beeminder api error text in exception message

pyminder/beeminder.py

@@ -55,10 +55,16 @@ def update_goal(self, goal_name, slug=None, title=None, yaxis=None, secret=None,
     def get_datapoints(self, goal_name):
         return self._call(f'/users/{self._user}/goals/{goal_name}/datapoints.json')
 
-    def create_datapoint(self, goal_name, value, timestamp, comment=None):
+    def create_datapoint(
+            self,
+            goal_name: str,
+            value: float,
+            unix_timestamp: float,
+            comment: str = None
+    ):
         return self._call(f'/users/{self._user}/goals/{goal_name}/datapoints.json', data={
             value: value,
-            timestamp: timestamp,
+            unix_timestamp: unix_timestamp,
             comment: comment
         }, method="POST")
 
@@ -97,7 +103,7 @@ def _call(self, endpoint, data=None, method='GET'):
             result = requests.put(url, data)
 
         if not result.status_code == requests.codes.ok:
-            raise Exception(f'API request failed with code {result.status_code}')
+            raise Exception(f'API request failed with code {result.status_code}: {result.text}')
 
         # self._persist_result(endpoint, result)
 

setup.py

@@ -10,7 +10,7 @@
 # This call to setup() does all the work
 setup(
     name="pyminder",
-    version="0.3.0",
+    version="0.4.0",
     description="Beeminder power tools library",
     long_description=README,
     long_description_content_type="text/markdown",