diff --git a/index.js b/index.js
index 1dc62d7..1ad3d0e 100644
--- a/index.js
+++ b/index.js
@@ -1,48 +1,66 @@
 const { ScreepsAPI } = require("screeps-api");
 const core = require("@actions/core");
 const fs = require("fs");
-const { glob } = require("glob");
+const glob = require("glob");
 const path = require("path");
 
+/**
+ * Replaces specific placeholder strings within the provided content with corresponding dynamic values.
+ *
+ * This function targets:
+ * - {{gitHash}} -> GITHUB_SHA
+ * - {{gitRef}} -> GITHUB_REF
+ * - {{deployTime}} -> ISO timestamp
+ * - {{hostname}} -> hostname
+ *
+ * @param {string} content
+ * @param {string} hostname
+ * @returns {string}
+ */
 function replacePlaceholders(content, hostname) {
   const deployTime = new Date().toISOString();
-  core.debug(
-    `Replacing placeholders with: GITHUB_SHA=${process.env.GITHUB_SHA}, GITHUB_REF=${process.env.GITHUB_REF}, deployTime=${deployTime}, hostname=${hostname}`,
-  );
+  const gitHash = process.env.GITHUB_SHA;
+  const gitRef = process.env.GITHUB_REF;
+
+  core.info("Replacing placeholders:");
+  core.info(`  GITHUB_SHA: ${gitHash}`);
+  core.info(`  GITHUB_REF: ${gitRef}`);
+  core.info(`  deployTime: ${deployTime}`);
+  core.info(`  hostname: ${hostname}`);
+
   return content
-    .replace(/{{gitHash}}/g, process.env.GITHUB_SHA)
-    .replace(/{{gitRef}}/g, process.env.GITHUB_REF)
+    .replace(/{{gitHash}}/g, gitHash)
+    .replace(/{{gitRef}}/g, gitRef)
     .replace(/{{deployTime}}/g, deployTime)
     .replace(/{{hostname}}/g, hostname);
 }
 
+/**
+ * Replaces placeholders in files matching a glob pattern.
+ *
+ * @param {string} pattern
+ * @param {string} [prefix]
+ * @param {string} hostname
+ * @returns {Promise<string[]>}
+ */
 async function readReplaceAndWriteFiles(pattern, prefix, hostname) {
   return new Promise((resolve, reject) => {
     const globPattern = prefix ? path.join(prefix, pattern) : pattern;
-    core.info(`Searching files with glob pattern: ${globPattern}`);
 
     glob(globPattern, async (err, files) => {
       if (err) {
-        core.error(`Glob error: ${err}`);
         return reject(err);
       }
 
-      if (files.length === 0) {
-        core.warning("No files matched the glob pattern.");
-      }
-
       let processPromises = [];
 
       files.forEach((file) => {
-        core.debug(`Processing file: ${file}`);
+        core.info(`Replacing placeholders in file: ${file}`);
         let processPromise = fs.promises
           .readFile(file, "utf8")
           .then((content) => {
             content = replacePlaceholders(content, hostname);
             return fs.promises.writeFile(file, content);
-          })
-          .then(() => {
-            core.info(`Replaced and wrote file: ${file}`);
           });
 
         processPromises.push(processPromise);
@@ -50,24 +68,26 @@ async function readReplaceAndWriteFiles(pattern, prefix, hostname) {
 
       try {
         await Promise.all(processPromises);
-        core.info(`Successfully processed ${files.length} files.`);
         resolve(files);
       } catch (processError) {
-        core.error(`Error during file processing: ${processError}`);
         reject(processError);
       }
     });
   });
 }
 
+/**
+ * Reads files matching a glob pattern into a dictionary.
+ * @param {string} pattern
+ * @param {string} prefix
+ * @returns {Promise<Object>}
+ */
 function readFilesIntoDict(pattern, prefix) {
   const globPattern = prefix ? path.join(prefix, pattern) : pattern;
-  core.info(`Reading files into dict with glob: ${globPattern}`);
 
   return new Promise((resolve, reject) => {
     glob(globPattern, (err, files) => {
       if (err) {
-        core.error(`Glob error: ${err}`);
         return reject(err);
       }
 
@@ -75,7 +95,6 @@ function readFilesIntoDict(pattern, prefix) {
       let readPromises = [];
 
       files.forEach((file) => {
-        core.debug(`Reading file: ${file}`);
         let readPromise = fs.promises.readFile(file, "utf8").then((content) => {
           let key = file;
           if (prefix && file.startsWith(prefix)) {
@@ -89,54 +108,70 @@ function readFilesIntoDict(pattern, prefix) {
       });
 
       Promise.all(readPromises)
-        .then(() => {
-          core.debug(`Read ${files.length} files into dictionary.`);
-          resolve(fileDict);
-        })
-        .catch((readErr) => {
-          core.error(`Error reading files: ${readErr}`);
-          reject(readErr);
-        });
+        .then(() => resolve(fileDict))
+        .catch(reject);
     });
   });
 }
 
+/**
+ * Validates the provided authentication credentials.
+ * @param {string} token
+ * @param {string} username
+ * @param {string} password
+ * @returns {string|null}
+ */
 function validateAuthentication(token, username, password) {
-  if (token && (username || password)) {
-    return "Token is defined along with username and/or password.";
-  }
-  if (!token && (!username || !password)) {
-    return "Username and password must both be defined if token is not used.";
+  if (token) {
+    if (username || password) {
+      return "Token is defined along with username and/or password.";
+    }
+  } else {
+    if (!username && !password) {
+      return "Neither token nor password and username are defined.";
+    }
+    if (username && !password) {
+      return "Username is defined but no password is provided.";
+    }
+    if (!username && password) {
+      return "Password is defined but no username is provided.";
+    }
   }
   return null;
 }
 
+/**
+ * Posts code to Screeps server.
+ */
 async function postCode() {
   const protocol = core.getInput("protocol") || "https";
   const hostname = core.getInput("hostname") || "screeps.com";
   const port = core.getInput("port") || "443";
   const path = core.getInput("path") || "/";
+
   const token = core.getInput("token") || undefined;
   const username = core.getInput("username") || undefined;
   const password = core.getInput("password") || undefined;
   const prefix = core.getInput("source-prefix");
   const pattern = core.getInput("pattern") || "*.js";
   const branch = core.getInput("branch") || "default";
+
   const gitReplace = core.getInput("git-replace") || null;
 
-  core.info("Starting Screeps code upload action...");
-
   if (gitReplace) {
-    core.info(`Replacing placeholders in files matching: ${gitReplace}`);
     await readReplaceAndWriteFiles(gitReplace, prefix, hostname);
   }
 
   const files_to_push = await readFilesIntoDict(pattern, prefix);
+
   core.info(
-    `Preparing to upload ${
+    `Uploading ${
       Object.keys(files_to_push).length
-    } files to branch: ${branch}`,
+    } file(s) to branch '${branch}':`,
   );
+  Object.keys(files_to_push).forEach((key) => {
+    core.info(`  File: ${key}`);
+  });
 
   const login_arguments = {
     token,
@@ -147,34 +182,35 @@ async function postCode() {
     port,
     path,
   };
-  core.debug(`Login arguments: ${JSON.stringify(login_arguments, null, 2)}`);
+
+  core.info("Authentication arguments:");
+  core.info(JSON.stringify(login_arguments, null, 2));
 
   const errorMessage = validateAuthentication(token, username, password);
   if (errorMessage) {
-    core.setFailed(errorMessage);
+    core.error(errorMessage);
     return;
   }
 
   let api = new ScreepsAPI(login_arguments);
 
-  try {
-    if (token) {
-      const response = await api.code.set(branch, files_to_push);
-      core.info(
-        `Code uploaded via token. Response: ${JSON.stringify(
-          response,
-          null,
-          2,
-        )}`,
-      );
-    } else {
-      core.info(`Logging in with username/password for user ${username}`);
-      await api.auth(username, password, login_arguments);
-      await api.code.set(branch, files_to_push);
-      core.info("Code uploaded via basic auth.");
-    }
-  } catch (err) {
-    core.setFailed(`Upload failed: ${err.message || err}`);
+  if (token) {
+    const response = await api.code.set(branch, files_to_push);
+    core.info(JSON.stringify(response, null, 2));
+    console.log(`Code set successfully to ${branch}`);
+  } else {
+    core.info(`Logging in as user ${username}`);
+    await Promise.resolve()
+      .then(() => api.auth(username, password, login_arguments))
+      .then(() => {
+        return api.code.set(branch, files_to_push);
+      })
+      .then(() => {
+        console.log(`Code set successfully to ${branch}`);
+      })
+      .catch((err) => {
+        console.error("Error:", err);
+      });
   }
 }