diff --git a/.gitignore b/.gitignore
index b8b2609..afef899 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 env/
 .DS_Store
 *.xlsx
-*.csv
\ No newline at end of file
+*.csv
+*.json
\ No newline at end of file
diff --git a/scripts/tat.py b/scripts/tat.py
new file mode 100644
index 0000000..e4c7555
--- /dev/null
+++ b/scripts/tat.py
@@ -0,0 +1,39 @@
+import firebase_admin
+from firebase_admin import firestore
+import os
+from datetime import datetime
+
+if __name__ == "__main__":
+
+    file_path = os.getcwd() + '/keys' + '/hpos-prod-firebase-adminsdk-bionp-7af43fc5d6.json'
+    cred = firebase_admin.credentials.Certificate(fr'{file_path}')
+
+    firebase_admin.initialize_app(cred)
+
+    db = firestore.client()
+
+    registrations = db.collection("patientData").stream()
+    hpos_tests = db.collection("testData").stream()
+
+    # print([doc.to_dict() for doc in patient_collection.stream()])
+
+    for registration in registrations:
+        registration_dic = registration.to_dict()
+        # print(registration_dic["_id"])
+        # hpos_test = filter(lambda x: x.to_dict()["_id"] != registration_dic["_id"], hpos_tests)
+        # print(list(hpos_test))
+
+        test_docs = db.collection("testData").where("_id", "==", registration_dic["_id"]).stream()
+
+        for test_doc in test_docs:
+            test_data = test_doc.to_dict()
+
+            # Combine the data from both collections into a single dictionary
+            combined_data = {**registration_dic, **test_data}
+
+            start_time = combined_data["createdAt"]
+            end_time = combined_data["testTime"]
+            delta = datetime.strptime(end_time, "%Y-%m-%d %H:%M:%S") - datetime.strptime(start_time, "%Y-%m-%d %H:%M:%S")
+            print(combined_data["createdAt"], combined_data["testTime"], delta)
+
+    firebase_admin.delete_app(firebase_admin.get_app())