Add method for getting the credit status

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## New features
 
-TBD
+- Add support for getting the credit status from the gateway.
 
 ## Changes
 

cpsms/cpsms.py

@@ -116,3 +116,12 @@ class Gateway:
         data = json.dumps(options).encode()
 
         return self.request("/v2/send", data=data)
+
+    def get_credit_status(self) -> float:
+        """Get the credit status."""
+        # As the amount is returned as a string with a Danish decimal
+        # separator, we replace this before parsing the amount.
+        data = self.request("/v2/creditvalue")
+        amount = float(data["credit"].replace(",", "."))
+
+        return amount