tsk-71: Add token expiration checks (#78)

Closes #71

Reviewed-on: #78
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

src/login_result.rs

@@ -12,7 +12,6 @@ pub struct LoginResult {
     pub expiration: i64,
 }
 
-
 impl LoginResult {
     pub fn to_json(&self) -> Result<String, serde_json::Error> {
         serde_json::to_string_pretty(&self)