diff --git a/lib/cleanup/index.js b/lib/cleanup/index.js
index 714f013c0..71ed34750 100644
--- a/lib/cleanup/index.js
+++ b/lib/cleanup/index.js
@@ -4241,8 +4241,11 @@ function cleanup() {
             }
         }
         catch (error) {
-            core.warning(`Login cleanup failed with ${error}. Cleanup will be skipped.`);
-            core.debug(error.stack);
+            const errorMessage = error instanceof Error ? error.message : String(error);
+            core.warning(`Login cleanup failed with ${errorMessage}. Cleanup will be skipped.`);
+            if (error instanceof Error && error.stack) {
+                core.debug(error.stack);
+            }
         }
     });
 }
diff --git a/lib/main/index.js b/lib/main/index.js
index 53710c157..d4b2ae6c6 100644
--- a/lib/main/index.js
+++ b/lib/main/index.js
@@ -4770,7 +4770,7 @@ function main() {
         try {
             (0, Utils_1.setUserAgent)();
             const preCleanup = process.env.AZURE_LOGIN_PRE_CLEANUP;
-            if ('true' == preCleanup) {
+            if ('true' === preCleanup) {
                 yield (0, Utils_1.cleanupAzCLIAccounts)();
                 if (core.getInput('enable-AzPSSession').toLowerCase() === "true") {
                     yield (0, Utils_1.cleanupAzPSAccounts)();
@@ -4790,8 +4790,11 @@ function main() {
             }
         }
         catch (error) {
-            core.setFailed(`Login failed with ${error}. Double check if the 'auth-type' is correct. Refer to https://github.com/Azure/login#readme for more information.`);
-            core.debug(error.stack);
+            const errorMessage = error instanceof Error ? error.message : String(error);
+            core.setFailed(`Login failed with ${errorMessage}. Double check if the 'auth-type' is correct. Refer to https://github.com/Azure/login#readme for more information.`);
+            if (error instanceof Error && error.stack) {
+                core.debug(error.stack);
+            }
         }
     });
 }
diff --git a/src/Cli/AzureCliLogin.ts b/src/Cli/AzureCliLogin.ts
index e762213f8..60290a90d 100644
--- a/src/Cli/AzureCliLogin.ts
+++ b/src/Cli/AzureCliLogin.ts
@@ -21,7 +21,7 @@ export class AzureCliLogin {
         core.debug(`Azure CLI path: ${this.azPath}`);
 
         let output: string = "";
-        const execOptions: any = {
+        const execOptions: ExecOptions = {
             listeners: {
                 stdout: (data: Buffer) => {
                     output += data.toString();
@@ -161,7 +161,7 @@ export class AzureCliLogin {
     async executeAzCliCommand(
         args: string[],
         silent?: boolean,
-        execOptions: any = {}) {
+        execOptions: ExecOptions = {}) {
         execOptions.silent = !!silent;
         await exec.exec(`"${this.azPath}"`, args, execOptions);
     }
diff --git a/src/PowerShell/AzPSUtils.ts b/src/PowerShell/AzPSUtils.ts
index 4b287cfd7..5ef4644cc 100644
--- a/src/PowerShell/AzPSUtils.ts
+++ b/src/PowerShell/AzPSUtils.ts
@@ -2,6 +2,7 @@ import * as core from '@actions/core';
 import * as os from 'os';
 import * as path from 'path';
 import * as exec from '@actions/exec';
+import { ExecOptions } from '@actions/exec/lib/interfaces';
 import * as io from '@actions/io';
 import AzPSScriptBuilder from './AzPSScriptBuilder';
 
@@ -54,7 +55,7 @@ export class AzPSUtils {
     static async runPSScript(psScript: string): Promise<string> {
         let outputString: string = "";
         let commandStdErr = false;
-        const options: any = {
+        const options: ExecOptions = {
             silent: true,
             listeners: {
                 stdout: (data: Buffer) => {
diff --git a/src/cleanup.ts b/src/cleanup.ts
index d307920d2..0272751fe 100644
--- a/src/cleanup.ts
+++ b/src/cleanup.ts
@@ -10,8 +10,11 @@ async function cleanup() {
         }
     }
     catch (error) {
-        core.warning(`Login cleanup failed with ${error}. Cleanup will be skipped.`);
-        core.debug(error.stack);
+        const errorMessage = error instanceof Error ? error.message : String(error);
+        core.warning(`Login cleanup failed with ${errorMessage}. Cleanup will be skipped.`);
+        if (error instanceof Error && error.stack) {
+            core.debug(error.stack);
+        }
     }
 }
 
diff --git a/src/main.ts b/src/main.ts
index add837a9e..cd88eca1c 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -8,7 +8,7 @@ async function main() {
     try {
         setUserAgent();
         const preCleanup: string = process.env.AZURE_LOGIN_PRE_CLEANUP;
-        if ('true' == preCleanup) {
+        if ('true' === preCleanup) {
             await cleanupAzCLIAccounts();
             if (core.getInput('enable-AzPSSession').toLowerCase() === "true") {
                 await cleanupAzPSAccounts();
@@ -31,8 +31,11 @@ async function main() {
         }
     }
     catch (error) {
-        core.setFailed(`Login failed with ${error}. Double check if the 'auth-type' is correct. Refer to https://github.com/Azure/login#readme for more information.`);
-        core.debug(error.stack);
+        const errorMessage = error instanceof Error ? error.message : String(error);
+        core.setFailed(`Login failed with ${errorMessage}. Double check if the 'auth-type' is correct. Refer to https://github.com/Azure/login#readme for more information.`);
+        if (error instanceof Error && error.stack) {
+            core.debug(error.stack);
+        }
     }
 }