diff --git a/tests/test_sdk.py b/tests/test_sdk.py
index 4a7f952b..10cddb0a 100644
--- a/tests/test_sdk.py
+++ b/tests/test_sdk.py
@@ -143,6 +143,18 @@ def test_mock_register(self, mock_post):
         resp = self.base.register(email=os.getenv("WATTTIME_EMAIL"))
         self.assertEqual(len(mock_post.call_args_list), 1)
 
+    def test_get_password(self):
+
+        with mock.patch.dict(os.environ, {}, clear=True), self.assertRaises(ValueError):
+            wt_base = WattTimeBase()
+
+        with mock.patch.dict(os.environ, {}, clear=True):
+            wt_base = WattTimeBase(
+                username="WATTTIME_USERNAME", password="WATTTIME_PASSWORD"
+            )
+            self.assertEqual(wt_base.username, "WATTTIME_USERNAME")
+            self.assertEqual(wt_base.password, "WATTTIME_PASSWORD")
+
 
 class TestWattTimeHistorical(unittest.TestCase):
     def setUp(self):
@@ -464,6 +476,11 @@ def test_historical_forecast_jsons_multithreaded(self):
 class TestWattTimeMaps(unittest.TestCase):
     def setUp(self):
         self.maps = WattTimeMaps()
+        self.myaccess = WattTimeMyAccess()
+
+    def tearDown(self):
+        self.maps.session.close()
+        self.myaccess.session.close()
 
     def tearDown(self):
         self.maps.session.close()
@@ -503,6 +520,22 @@ def test_region_from_loc(self):
         self.assertEqual(region["region_full_name"], "Public Service Co of Colorado")
         self.assertEqual(region["signal_type"], "co2_moer")
 
+    def test_my_access_in_geojson(self):
+        access = self.myaccess.get_access_pandas()
+        for signal_type in ["co2_moer", "co2_aoer", "health_damage"]:
+            access_regions = access.loc[
+                access["signal_type"] == signal_type, "region"
+            ].unique()
+            maps = self.maps.get_maps_json(signal_type=signal_type)
+            maps_regions = [i["properties"]["region"] for i in maps["features"]]
+
+            assert (
+                set(access_regions) - set(maps_regions) == set()
+            ), f"Missing regions in geojson for {signal_type}: {set(access_regions) - set(maps_regions)}"
+            assert (
+                set(maps_regions) - set(access_regions) == set()
+            ), f"Extra regions in geojson for {signal_type}: {set(maps_regions) - set(access_regions)}"
+
 
 class TestWattTimeMarginalFuelMix(unittest.TestCase):
     def setUp(self):
diff --git a/watttime/api.py b/watttime/api.py
index b84b575e..8be1113e 100644
--- a/watttime/api.py
+++ b/watttime/api.py
@@ -37,8 +37,17 @@ def __init__(
             worker_count (int): The number of worker threads to use for multithreading. Default is min(10, (os.cpu_count() or 1) * 2).
 
         """
-        self.username = username or os.getenv("WATTTIME_USER")
-        self.password = password or os.getenv("WATTTIME_PASSWORD")
+
+        # This only applies to the current session, is not stored persistently
+        if username and not os.getenv("WATTTIME_USER"):
+            os.environ["WATTTIME_USER"] = username
+        if password and not os.getenv("WATTTIME_PASSWORD"):
+            os.environ["WATTTIME_PASSWORD"] = password
+
+        # Accessing attributes will raise exception if variables are not set
+        _ = self.password
+        _ = self.username
+
         self.token = None
         self.headers = None
         self.token_valid_until = None
@@ -56,6 +65,28 @@ def __init__(
 
         self.session = requests.Session()
 
+    @property
+    def password(self):
+        password = os.getenv("WATTTIME_PASSWORD")
+        if not password:
+            raise ValueError(
+                "WATTTIME_PASSWORD env variable is not set."
+                + "Please set this variable, or pass in a password upon initialization,"
+                + "which will store it as a variable only for the current session"
+            )
+        return password
+
+    @property
+    def username(self):
+        username = os.getenv("WATTTIME_USER")
+        if not username:
+            raise ValueError(
+                "WATTTIME_USER env variable is not set."
+                + "Please set this variable, or pass in a username upon initialization,"
+                + "which will store it as a variable only for the current session"
+            )
+        return username
+
     def _login(self):
         """
         Login to the WattTime API, which provides a JWT valid for 30 minutes