Update README.md

README.md

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-# aws-user-report
-Generate an IAM User Report
+# AWS IAM User Report
+######Create HTML or JSON User Reports for one or more AWS Accounts
+![AWS IAM User Report](https://raw.githubusercontent.com/lloesche/aws-user-report/master/misc/report.png "AWS IAM User Report")
+
+## Introduction
+Tool to create User reports for multiple AWS accounts with information
+about who changed their password when and who's even using their accounts. 
+
+## Usage Examples
+Just dump a report with default credentials
+```
+./report.py > report.html
+```
+Dump a report in JSON format and use verbose logging
+```
+./report.py --verbose --json > report.json
+```
+Create Report for multiple AWS Accounts and send it by Email
+```
+./report.py --aws-credentials "Prod Account,AKIXXXXXXXX,XXXXXXXX" \
+                              "Dev Account,AKIXXXXXXXX,XXXXXXXX" \
+            --smtp-server smtp.mandrillapp.com \
+            --smtp-port 587 \
+            --smtp-login mysmtplogin \
+            --smtp-password mysmtppassword \
+            --smtp-from [email protected] \
+            --smtp-to [email protected] \
+            --footer "© 2016 ACME Inc."
+```