1 files changed, 19 insertions, 8 deletions
diff --git a/lib/matrix_app_service/client.ex b/lib/matrix_app_service/client.ex
index 42ef758..cec1046 100644
--- a/lib/matrix_app_service/client.ex
+++ b/lib/matrix_app_service/client.ex
@@ -24,10 +24,21 @@ defmodule MatrixAppService.Client do
           Polyjuice.Client.LowLevel.t()
   def client(opts \\ []) do
     base_url =
-      Keyword.get(opts, :base_url, Application.fetch_env!(:matrix_app_service, :base_url))
+      Keyword.get(opts, :base_url) ||
+        (MatrixAppService.Application.start_endpoint?() &&
+           MatrixAppServiceWeb.Endpoint.config(:base_url)) ||
+        Application.get_env(:matrix_app_service, :app_service)[:base_url] ||
+        raise "MatrixAppService: config key base_url missing"
+
+    access_token =
+      Keyword.get(opts, :access_token) ||
+        (MatrixAppService.Application.start_endpoint?() &&
+           MatrixAppServiceWeb.Endpoint.config(:access_token)) ||
+        Application.get_env(:matrix_app_service, :app_service)[:access_token] ||
+        raise "MatrixAppService: config key access_token missing"
 
     default_opts = [
-      access_token: Application.fetch_env!(:matrix_app_service, :access_token),
+      access_token: access_token,
       device_id: "APP_SERVICE"
     ]
 
@@ -82,12 +93,12 @@ defmodule MatrixAppService.Client do
 
   Arguments:
   1. `opts`: a keyword list that can contain these keys:
-     * `:inhibit_login`: true
-     * `:device_id`: device ID, defaults to `"APP_SERVICE"`
-     * `:initial_device_display_name`: device name, defaults to
-       `"ApplicationService"`
-     * `:kind`: kind of account to register, defaults to `"user"`, can also be
-       `"guest"`
+    * `:inhibit_login`: true
+    * `:device_id`: device ID, defaults to `"APP_SERVICE"`
+    * `:initial_device_display_name`: device name, defaults to
+      `"ApplicationService"`
+    * `:kind`: kind of account to register, defaults to `"user"`, can also be
+      `"guest"`
   2. `client_options`: see `client/1`
   """
   @spec register(Polyjuice.Client.LowLevel.register_opts(), client_options()) ::