Add logging in project based on 'log' library.

Cargo.toml

@@ -34,6 +34,7 @@ futures = { version = "0.3.28", optional = true}
 thiserror = { version = "1.0.43", optional = true }
 ureq = { version = "2.7.1", optional = true, features = ["native-tls", "json"] }
 native-tls = { version = "0.2.11", optional = true }
+log = "0.4.19"
 
 [features]
 default = ["online"]

src/api/sync.rs

@@ -109,6 +109,9 @@ impl ApiBuilder {
     pub fn new() -> Self {
         let cache = Cache::default();
         let token_filename = cache.token_path();
+        if !token_filename.exists() {
+            log::info!("Token file not found {path:?}");
+        }
         let token = match std::fs::read_to_string(token_filename) {
             Ok(token_content) => {
                 let token_content = token_content.trim();

src/api/tokio.rs

@@ -97,6 +97,9 @@ impl ApiBuilder {
     pub fn new() -> Self {
         let cache = Cache::default();
         let token_filename = cache.token_path();
+        if !token_filename.exists() {
+            log::info!("Token file not found {path:?}");
+        }
         let token = match std::fs::read_to_string(token_filename) {
             Ok(token_content) => {
                 let token_content = token_content.trim();