diff --git a/lib/fcm.rb b/lib/fcm.rb
index 08980ce..eead637 100644
--- a/lib/fcm.rb
+++ b/lib/fcm.rb
@@ -217,6 +217,16 @@ def send_to_topic_condition(condition, options = {})
     end
   end
 
+  def jwt_token
+    scope = "https://www.googleapis.com/auth/firebase.messaging"
+    @authorizer ||= Google::Auth::ServiceAccountCredentials.make_creds(
+      json_key_io: json_key,
+      scope: scope,
+    )
+    token = @authorizer.fetch_access_token!
+    token["access_token"]
+  end
+
   private
 
   def for_uri(uri, extra_headers = {})
@@ -316,16 +326,6 @@ def validate_condition_topics?(condition)
     topics.all? { |topic| topic.gsub(TOPIC_REGEX, "").length == 0 }
   end
 
-  def jwt_token
-    scope = "https://www.googleapis.com/auth/firebase.messaging"
-    @authorizer ||= Google::Auth::ServiceAccountCredentials.make_creds(
-      json_key_io: json_key,
-      scope: scope,
-    )
-    token = @authorizer.fetch_access_token!
-    token["access_token"]
-  end
-
   def json_key
     @json_key ||= if @json_key_path.respond_to?(:read)
                     @json_key_path