don't use env vars

erddapy/core/url.py

@@ -43,18 +43,21 @@ def _sort_url(url):
 def _urlopen(url: str, auth: tuple | None = None, **kwargs: dict) -> BinaryIO:
     if "timeout" not in kwargs.keys():
         kwargs["timeout"] = 60
+    user = kwargs.pop("user", None)
+    password = kwargs.pop("password", None)
     with httpx.Client() as client:
         p = parse.urlparse(url)
         protocol = "tabledap" if "tabledap" in p.path else "griddap"
         base = p.path.split(f"/{protocol}/")[0]
-        login_page = f"{p.scheme}://{p.netloc}{base}/login.html"
-        client.post(
-            login_page,
-            data={
-                "user": os.getenv("ERDDAP_USERNAME"),
-                "password": os.getenv("ERDDAP_PASSWORD"),
-            },
-        )
+        if user is not None and password is not None:
+            login_page = f"{p.scheme}://{p.netloc}{base}/login.html"
+            client.post(
+                login_page,
+                data={
+                    "user": f"{user}",
+                    "password": f"{password}",
+                },
+            )
         response = client.get(url, follow_redirects=True, auth=auth, **kwargs)
 
     try:

erddapy/erddapy.py

@@ -362,6 +362,7 @@ def to_pandas(
         response = kw.pop("response", "csvp")
         distinct = kw.pop("distinct", False)
         url = self.get_download_url(response=response, distinct=distinct)
+        requests_kwargs = requests_kwargs if requests_kwargs else self.requests_kwargs
         return to_pandas(url, requests_kwargs=requests_kwargs, pandas_kwargs=dict(**kw))
 
     def to_ncCF(self, protocol: str = None, **kw):