Get token (#8)

Reviewed-on: #8

src/service/core.rs

@@ -0,0 +1,29 @@
+pub struct Service {
+    pub app: crate::app::App,
+    pub token: textsender_models::token::Login,
+}
+
+impl Service {
+    pub async fn do_the_work(&mut self) {
+        println!("Do some work");
+        todo!(
+            r#"
+        Need to finish this
+
+        This function should fetch a token, check if the token is valid, and obtain a refresh token if
+        it has expired.
+
+        Then do the real work.
+
+        1. Check the queue
+        2. If there is an item, get the data, 
+        3. Evaluate if it is schedulable
+        4. Get the events and iterate each one
+        5. starting with the message
+        6. Get the contact
+        7. Send the message
+        8. Record the message event response
+            "#
+        );
+    }
+}