PAT Azure Devops 1. ERROR The Personal Access Token is mandatory The error message "ERROR The Personal Access Token is mandatory" means that you're trying to perform an operation (most likely publishing a VS Code extension using vsce) that requires authentication with the VS Code Marketplace, and you haven't provided a Personal Access Token (PAT). Here's a breakdown of the problem and how to fix it: Understanding the Error Authentication: Publishing extensions to the VS Code Marketplace requires authentication to verify your identity and permissions. This authentication is done using a Personal Access Token (PAT). vsce Requirement: The vsce (Visual Studio Code Extensions) tool, which is used to package and publish VS Code extensions, requires a PAT to authenticate with the marketplace. Missing PAT: The error indicates that you're running a vsce command (like vsce publish) without providing a PAT. 2. How to Fix the Error Create a Personal Access Token (PAT): You'll need to create a PAT on Azure DevOps (formerly Visual Studio Team Services), which is used to manage VS Code Marketplace authentication. Follow these steps: Go to your Azure DevOps organization. Click on your user settings (usually your profile picture) in the top right corner. Select "Personal access tokens." Click "New Token." Give your token a descriptive name (e.g., "VS Code Extension Publishing"). Set an expiration date for the token. Under "Scopes," select "Marketplace (Publish)." This is the crucial step. Click "Create." 3. Important: Copy the generated PAT immediately and store it securely. You won't be able to retrieve it later. Provide the PAT to vsce: You can provide the PAT to vsce in a few ways: Environment Variable: The recommended approach is to set the VSCE_ACCESS_TOKEN environment variable. Windows: Bash setx VSCE_ACCESS_TOKEN "your-personal-access-token" After setting the environment variable, close and reopen your terminal. macOS/Linux: Bash export VSCE_ACCESS_TOKEN="your-personal-access-token" If you want to make this change permanent, add the export command to your shell's configuration file (e.g., ~/.bashrc, ~/.zshrc). Command-Line Argument: You can provide the PAT as a command-line argument using the --pat flag: Bash vsce publish --pat "your-personal-access-token" This is generally less secure than using an environment variable, as the PAT will be visible in your command history.