diff --git a/handler/app.py b/handler/app.py
index b1763c7..8fa1078 100755
--- a/handler/app.py
+++ b/handler/app.py
@@ -74,6 +74,22 @@ class WebApp(object):
         # self.tx.transaction(parsed)
         return dumps(True)
 
+    @app.route("/signin", methods=["GET"])
+    def signin(self, request):
+        auth_url = self.truelayer.create_auth_url()
+        return f'Please sign in <a href="{auth_url}" target="_blank">here.</a>'
+
+    @app.route("/callback-truelayer", methods=["POST"])
+    def signin_callback(self, request):
+        code = request.args[b"code"]
+        self.truelayer.handle_authcode_received(code)
+        return dumps(True)
+
+    @app.route("/accounts", methods=["GET"])
+    def balance(self, request):
+        accounts = self.truelayer.get_accounts()
+        return dumps(accounts)
+
 
 if __name__ == "__main__":
     init_map = {
diff --git a/handler/sinks/truelayer.py b/handler/sinks/truelayer.py
index 454cfc0..28e7af4 100644
--- a/handler/sinks/truelayer.py
+++ b/handler/sinks/truelayer.py
@@ -3,8 +3,9 @@ from twisted.logger import Logger
 
 # Other library imports
 import requests
-from json import dumps
 from simplejson.errors import JSONDecodeError
+from time import time
+import urllib
 
 # Project imports
 from settings import settings
@@ -18,57 +19,61 @@ class TrueLayer(object):
     def __init__(self):
         self.log = Logger("truelayer")
         self.token = None
-        # self.auth = HTTPBasicAuth(settings.Yapily.ID, settings.Yapily.Key)
-        # print(self.get_institutions())
-        # authorisation = self.get_authorisation("monzo_ob", settings.Yapily.CallbackURL)
-        # print("authirisation", authorisation)
 
     def setup_auth(self):
-        """
-        Exchange an authentication code for an access and refresh token.
-        """
-        headers = {"Content-Type": "application/x-www-form-urlencoded"}
+        pass
+
+    def create_auth_url(self):
+        query = urllib.parse.urlencode(
+            {
+                "response_type": "code",
+                "response_mode": "form_post",
+                "client_id": settings.TrueLayer.ID,
+                "scope": "info accounts balance transactions offline_access",
+                "nonce": int(time()),
+                "redirect_uri": settings.TrueLayer.CallbackURL,
+                "enable_mock": "true",
+            }
+        )
+        auth_uri = f"{settings.TrueLayer.AuthBase}/?{query}&redirect_uri={settings.TrueLayer.CallbackURL}"
+        return auth_uri
+
+    def handle_authcode_received(self, authcode):
         data = {
-            "grant_type": "authorization_code",
-            "code": settings.TrueLayer.Monzo_AuthCode,
             "client_id": settings.TrueLayer.ID,
             "client_secret": settings.TrueLayer.Key,
-            "redirect_uri": "https://console.truelayer.com/redirect-page",
+            "code": authcode,
+            "grant_type": "authorization_code",
+            "redirect_uri": settings.TrueLayer.CallbackURL,
         }
-        r = requests.post(f"{settings.TrueLayer.Base}/connect/token", data=data, headers=headers)
+        r = requests.post(f"{settings.TrueLayer.AuthBase}/connect/token", data=data)
         try:
             parsed = r.json()
         except JSONDecodeError:
-            self.log.error("Error parsing access token response: {content}", content=r.content)
             return False
-        print("PARSED", parsed)
-        if r.status_code == 200:
-            try:
-                settings.TrueLayer.Monzo_RefreshToken = parsed["refresh_token"]
-                settings.TrueLayer.Monzo_SetupToken = "0"
-                settings.write()
-                self.log.info("Refreshed refresh token - TrueLayer")
-                self.token = parsed["access_token"]
-                self.log.info("Refreshed access token - TrueLayer")
-            except KeyError:
-                self.log.error(f"Token authorization didn't contain refresh or access token: {parsed}", parsed=parsed)
-                return False
-        else:
-            self.log.error(f"Cannot refresh token: {parsed}", parsed=parsed)
+        if "error" in parsed:
+            self.log.error("Error requesting refresh token: {error}", error=parsed["error"])
             return False
+        settings.TrueLayer.RefreshToken = parsed["refresh_token"]
+        settings.TrueLayer.AuthCode = authcode
+        settings.write()
+        self.token = parsed["access_token"]
+        self.log.info("Retrieved access/refresh tokens - TrueLayer")
 
     def get_new_token(self, fail=False):
         """
         Exchange our refresh token for an access token.
         """
+        if not settings.TrueLayer.RefreshToken:
+            return
         headers = {"Content-Type": "application/x-www-form-urlencoded"}
         data = {
             "grant_type": "refresh_token",
-            "refresh_token": settings.TrueLayer.Monzo_RefreshToken,
+            "refresh_token": settings.TrueLayer.RefreshToken,
             "client_id": settings.TrueLayer.ID,
             "client_secret": settings.TrueLayer.Key,
         }
-        r = requests.post(f"{settings.TrueLayer.Base}/connect/token", data=data, headers=headers)
+        r = requests.post(f"{settings.TrueLayer.AuthBase}/connect/token", data=data, headers=headers)
         try:
             parsed = r.json()
         except JSONDecodeError:
@@ -91,31 +96,18 @@ class TrueLayer(object):
                 exit()
             return False
 
-    def get_institutions(self, filter_name=None):
+    def get_accounts(self):
         """
-        Get a list of supported institutions.
+        Get a list of accounts.
         """
-
-        path = f"{settings.Yapily.Base}/institutions"
-        r = requests.get(path, auth=self.auth)
-        try:
-            parsed = r.json()
-        except JSONDecodeError:
-            self.log.error("Error parsing institutions response: {content}", content=r.content)
-            return False
-        return parsed
-
-    def get_authorisation(self, institution_id, callback_url):
-        """
-        Get an authorisation URL for linking a bank account of an institution.
-        """
-        headers = {"Content-Type": "application/json"}
-        data = {"applicationUserId": "account-data-and-transactions-tutorial", "institutionId": institution_id, "callback": callback_url}
-        path = f"{settings.Yapily.Base}/account-auth-requests"
-        r = requests.post(path, headers=headers, data=dumps(data), auth=self.auth)
+        headers = {"Authorization": f"Bearer {self.token}"}
+        # path = f"{settings.TrueLayer.DataBase}/accounts"
+        path = "https://api.truelayer-sandbox.com/data/v1/accounts"
+        r = requests.get(path, headers=headers)
         try:
             parsed = r.json()
         except JSONDecodeError:
             self.log.error("Error parsing institutions response: {content}", content=r.content)
             return False
+        print("GET ACCOUNTS", parsed)
         return parsed