How to Fix: Missing Authentication Token while accessing API Gateway?
API Gateway requires AWS_IAM authentication with a valid IAM user's access key ID and secret access key.
📋 Table of Contents
The 'Missing Authentication Token' error occurs when the AWS IAM role attached to your Lambda function or API Gateway does not have a valid execution role. This happens because the IAM role is not properly configured, resulting in an invalid security token.
💡 Why You Are Getting This Error
- [Cause]
🔧 Proven Troubleshooting Steps
Method 1: Verify IAM Role Configuration
- Step 1: Go to the AWS Management Console and navigate to the IAM dashboard.
Method 2: Attach a Valid Execution Role
- Step 1: Create or select an IAM execution role that has the necessary permissions for your Lambda function.
Method 3: Update API Gateway Configuration
- Step 1: Go to the AWS Management Console and navigate to the API Gateway dashboard.
Method 4: Test with a Different Authentication Type
- Step 1: Go to the API Gateway dashboard and update the authentication type to NONE.
🎯 Final Words
By following these troubleshooting steps, you should be able to resolve the 'Missing Authentication Token' error and secure your API Gateway.
❓ Frequently Asked Questions
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